chore(deps): update dependency com.google.cloud:google-cloud-service-management to v3.1.2 (#270)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-service-management](https://togithub.com/googleapis/java-service-management) | `3.1.1` -> `3.1.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-service-management/3.1.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-service-management/3.1.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-service-management/3.1.2/compatibility-slim/3.1.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-service-management/3.1.2/confidence-slim/3.1.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-service-management</summary>

### [`v3.1.2`](https://togithub.com/googleapis/java-service-management/blob/HEAD/CHANGELOG.md#&#8203;312-httpsgithubcomgoogleapisjava-service-managementcomparev311v312-2022-07-01)

[Compare Source](https://togithub.com/googleapis/java-service-management/compare/v3.1.1...v3.1.2)

##### Bug Fixes

-   update gapic-generator-java with mock service generation fixes ([#&#8203;255](https://togithub.com/googleapis/java-service-management/issues/255)) ([4eee177](https://togithub.com/googleapis/java-service-management/commit/4eee1773944cefbbc38b3027df16d17e79a79424))

</details>

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samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-service-management</artifactId>
-      <version>3.1.1</version>
+      <version>3.1.2</version>
     </dependency>
     <!-- [END service-management_install_without_bom] -->
 

samples/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-service-management</artifactId>
-      <version>3.1.1</version>
+      <version>3.1.2</version>
     </dependency>
   <!-- {x-version-update-end} -->
 

samples/snippets/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-service-management</artifactId>
-      <version>3.1.1</version>
+      <version>3.1.2</version>
     </dependency>
 
     <dependency>