fix(deps): update dependency com.google.cloud:cloud-spanner-spring-data-r2dbc to v1.2.0 (GoogleCloudPlatform#7591)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:cloud-spanner-spring-data-r2dbc](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc) | `1.1.0` -> `1.2.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-spring-data-r2dbc/1.2.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-spring-data-r2dbc/1.2.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-spring-data-r2dbc/1.2.0/compatibility-slim/1.1.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:cloud-spanner-spring-data-r2dbc/1.2.0/confidence-slim/1.1.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>GoogleCloudPlatform/cloud-spanner-r2dbc</summary>

### [`v1.2.0`](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/releases/tag/v1.2.0)

[Compare Source](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/compare/v1.1.0...v1.2.0)

-   Upgraded SPI to 0.9.0 and fixed blocking errors [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/489](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/489)
-   Added support for binding arrays and lists to Spanner native arrays [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/495](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/495)
-   Added Google Java types to the Spring Data's SimpleType collection in the SpannerR2dbcDialect  [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/issues/517](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/issues/517)
-   Upgraded to Spring Boot 2.7 and Spring Data R2DBC 1.5.6 [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/558](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/558) [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/600](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/600)
-   Upgraded to Project Reactor 2020.0.26 [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/611](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/611)
-   Upgraded to Google Cloud Java Client Libraries BOM 26.1.5 [https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/602](https://github.com/GoogleCloudPlatform/cloud-spanner-r2dbc/pull/602)

</details>

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spanner/r2dbc/pom.xml

@@ -50,7 +50,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>cloud-spanner-spring-data-r2dbc</artifactId>
-      <version>1.1.0</version>
+      <version>1.2.0</version>
     </dependency>
     <!-- [END spanner_spring_data_r2dbc_dependency] -->