chore(deps): update dependency com.google.cloud:google-cloud-datastore to v2.21.2 (#1570)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-datastore](https://redirect.github.com/googleapis/java-datastore) | `2.20.0` -> `2.21.2` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.cloud:google-cloud-datastore/2.21.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.cloud:google-cloud-datastore/2.21.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.cloud:google-cloud-datastore/2.20.0/2.21.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.cloud:google-cloud-datastore/2.20.0/2.21.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/java-datastore (com.google.cloud:google-cloud-datastore)</summary>

### [`v2.21.2`](https://redirect.github.com/googleapis/java-datastore/blob/HEAD/CHANGELOG.md#2212-2024-08-22)

[Compare Source](https://redirect.github.com/googleapis/java-datastore/compare/v2.21.1...v2.21.2)

##### Dependencies

-   Update dependency com.google.cloud:sdk-platform-java-config to v3.34.0 ([#&#8203;1547](https://redirect.github.com/googleapis/java-datastore/issues/1547)) ([8c5f595](https://redirect.github.com/googleapis/java-datastore/commit/8c5f5954d88732ab929b4477a3f15b0052adc2ff))

### [`v2.21.1`](https://redirect.github.com/googleapis/java-datastore/blob/HEAD/CHANGELOG.md#2211-2024-08-06)

[Compare Source](https://redirect.github.com/googleapis/java-datastore/compare/v2.21.0...v2.21.1)

##### Dependencies

-   Update dependency com.google.cloud:sdk-platform-java-config to v3.33.0 ([#&#8203;1531](https://redirect.github.com/googleapis/java-datastore/issues/1531)) ([9e52395](https://redirect.github.com/googleapis/java-datastore/commit/9e52395f7ee71315331790284d35e7aad2f387ed))

### [`v2.21.0`](https://redirect.github.com/googleapis/java-datastore/blob/HEAD/CHANGELOG.md#2210-2024-07-31)

[Compare Source](https://redirect.github.com/googleapis/java-datastore/compare/v2.20.2...v2.21.0)

##### Features

-   Enable hermetic library generation ([#&#8203;1462](https://redirect.github.com/googleapis/java-datastore/issues/1462)) ([d142d9c](https://redirect.github.com/googleapis/java-datastore/commit/d142d9c95d91c8cadaf696efc12d6136814938ff))

### [`v2.20.2`](https://redirect.github.com/googleapis/java-datastore/blob/HEAD/CHANGELOG.md#2202-2024-06-28)

[Compare Source](https://redirect.github.com/googleapis/java-datastore/compare/v2.20.1...v2.20.2)

##### Dependencies

-   Update dependency com.google.cloud:sdk-platform-java-config to v3.32.0 ([#&#8203;1492](https://redirect.github.com/googleapis/java-datastore/issues/1492)) ([d940c93](https://redirect.github.com/googleapis/java-datastore/commit/d940c937959942d753f9215e7ce940ab6742be46))

### [`v2.20.1`](https://redirect.github.com/googleapis/java-datastore/blob/HEAD/CHANGELOG.md#2201-2024-06-04)

[Compare Source](https://redirect.github.com/googleapis/java-datastore/compare/v2.20.0...v2.20.1)

##### Dependencies

-   Update dependency com.google.cloud:sdk-platform-java-config to v3.31.0 ([#&#8203;1471](https://redirect.github.com/googleapis/java-datastore/issues/1471)) ([42c643d](https://redirect.github.com/googleapis/java-datastore/commit/42c643d78562c5cbd6c17c29a0a124be8d05198a))
-   Update dependency com.google.errorprone:error_prone_core to v2.28.0 ([#&#8203;1469](https://redirect.github.com/googleapis/java-datastore/issues/1469)) ([e3fac2b](https://redirect.github.com/googleapis/java-datastore/commit/e3fac2bf9992fcb2e91319df0520094865de2d49))
-   Update dependency com.google.guava:guava-testlib to v33.2.1-jre ([#&#8203;1470](https://redirect.github.com/googleapis/java-datastore/issues/1470)) ([614e930](https://redirect.github.com/googleapis/java-datastore/commit/614e930f2bdccc517d4733e5fb7f3cefad696a20))

</details>

---

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Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-datastore</artifactId>
-      <version>2.20.0</version>
+      <version>2.21.2</version>
     </dependency>
     <!-- [END datastore_install_without_bom] -->