chore(deps): update dependency com.google.cloud:google-cloud-build to v3.2.0 (#594)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-build](https://togithub.com/googleapis/java-cloudbuild) | `3.1.0` -> `3.2.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-build/3.2.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-build/3.2.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-build/3.2.0/compatibility-slim/3.1.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-build/3.2.0/confidence-slim/3.1.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/java-cloudbuild</summary>

### [`v3.2.0`](https://togithub.com/googleapis/java-cloudbuild/blob/master/CHANGELOG.md#&#8203;320-httpswwwgithubcomgoogleapisjava-cloudbuildcomparev310v320-2021-08-27)

[Compare Source](https://togithub.com/googleapis/java-cloudbuild/compare/v3.1.0...v3.2.0)

##### Features

-   Remove use of deprecated gradle command in java README ([#&#8203;1196](https://www.togithub.com/googleapis/java-cloudbuild/issues/1196)) ([#&#8203;589](https://www.togithub.com/googleapis/java-cloudbuild/issues/589)) ([8791708](https://www.github.com/googleapis/java-cloudbuild/commit/8791708b6b01e26108822b1c78be824e9a73af1e))
-   Update cloudbuild proto with the service_account for BYOSA Triggers. ([#&#8203;586](https://www.togithub.com/googleapis/java-cloudbuild/issues/586)) ([84ce78e](https://www.github.com/googleapis/java-cloudbuild/commit/84ce78eec59d3889fdce3fd74234d5397aabb3d1))

</details>

---

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---

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Author: renovate-bot

README.md

@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-build</artifactId>
-  <version>3.1.0</version>
+  <version>3.2.0</version>
 </dependency>
 
 ```

samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-build</artifactId>
-      <version>3.1.0</version>
+      <version>3.2.0</version>
     </dependency>
     <!-- [END build_install_without_bom] -->
 

samples/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-build</artifactId>
-      <version>3.1.0</version>
+      <version>3.2.0</version>
     </dependency>
 
     <dependency>