chore: fix minor typos in README and pom templates (#1479) (#1941)

Source-Link: googleapis/synthtool@18d4e9b
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:f8374176dc59291f05dd3fec927a9da2cda687a9ef4de32e77f699a2be12ab45

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:6d4e3a15c62cfdcb823d60e16da7521e7c6fc00eba07c8ff12e4de9924a57d28
-# created: 2022-06-29T23:17:33.110417661Z
+  digest: sha256:f8374176dc59291f05dd3fec927a9da2cda687a9ef4de32e77f699a2be12ab45
+# created: 2022-07-07T14:26:11.880812641Z

README.md

@@ -11,7 +11,7 @@ Java idiomatic client for [Cloud Spanner][product-docs].
 
 ## Quickstart
 
-If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
+If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file:
 
 ```xml
 <dependencyManagement>
@@ -46,20 +46,20 @@ If you are using Maven without BOM, add this to your dependencies:
 
 ```
 
-If you are using Gradle 5.x or later, add this to your dependencies
+If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
 implementation platform('com.google.cloud:libraries-bom:25.4.0')
 
 implementation 'com.google.cloud:google-cloud-spanner'
 ```
-If you are using Gradle without BOM, add this to your dependencies
+If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
 implementation 'com.google.cloud:google-cloud-spanner:6.25.7'
 ```
 
-If you are using SBT, add this to your dependencies
+If you are using SBT, add this to your dependencies:
 
 ```Scala
 libraryDependencies += "com.google.cloud" % "google-cloud-spanner" % "6.25.7"