chore(deps): update dependency com.google.cloud:google-cloud-workflows to v2.1.0 (#333)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-workflows](https://togithub.com/googleapis/java-workflows) | `2.0.2` -> `2.1.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/2.1.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/2.1.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/2.1.0/compatibility-slim/2.0.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-workflows/2.1.0/confidence-slim/2.0.2)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.1.0`](https://togithub.com/googleapis/java-workflows/blob/master/CHANGELOG.md#&#8203;210-httpswwwgithubcomgoogleapisjava-workflowscomparev202v210-2021-09-01)

[Compare Source](https://togithub.com/googleapis/java-workflows/compare/v2.0.2...v2.1.0)

##### Features

-   Remove use of deprecated gradle command in java README ([#&#8203;1196](https://www.togithub.com/googleapis/java-workflows/issues/1196)) ([#&#8203;327](https://www.togithub.com/googleapis/java-workflows/issues/327)) ([5525ccd](https://www.github.com/googleapis/java-workflows/commit/5525ccd9eb08a07be773aaee773812a6c42ec483))

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.2.0 ([#&#8203;329](https://www.togithub.com/googleapis/java-workflows/issues/329)) ([c8cf2d8](https://www.github.com/googleapis/java-workflows/commit/c8cf2d848689b49beb398d9be088d7da1d1c1107))

##### [2.0.2](https://www.github.com/googleapis/java-workflows/compare/v2.0.1...v2.0.2) (2021-08-23)

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.1.0 ([#&#8203;321](https://www.togithub.com/googleapis/java-workflows/issues/321)) ([332dfd5](https://www.github.com/googleapis/java-workflows/commit/332dfd508eaac6f6ca2d2f5b463df3c80ae9e435))

##### [2.0.1](https://www.github.com/googleapis/java-workflows/compare/v2.0.0...v2.0.1) (2021-08-12)

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.0.1 ([#&#8203;315](https://www.togithub.com/googleapis/java-workflows/issues/315)) ([a187352](https://www.github.com/googleapis/java-workflows/commit/a1873529849dd569be91758e5f70fa94233a9c21))

</details>

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Author: renovate-bot

java-workflows/README.md

@@ -19,7 +19,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-workflows</artifactId>
-  <version>2.0.2</version>
+  <version>2.1.0</version>
 </dependency>
 
 ```

java-workflows/samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-workflows</artifactId>
-      <version>2.0.2</version>
+      <version>2.1.0</version>
     </dependency>
     <!-- [END workflows_install_without_bom] -->
 

java-workflows/samples/snippets/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-workflows</artifactId>
-      <version>2.0.2</version>
+      <version>2.1.0</version>
     </dependency>
 
     <dependency>