chore(deps): update dependency com.google.cloud:google-cloud-datalabeling to v0.121.2 (#591)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-datalabeling](https://togithub.com/googleapis/java-datalabeling) | `0.121.1` -> `0.121.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-datalabeling/0.121.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-datalabeling/0.121.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-datalabeling/0.121.2/compatibility-slim/0.121.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-datalabeling/0.121.2/confidence-slim/0.121.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v0.121.2`](https://togithub.com/googleapis/java-datalabeling/blob/master/CHANGELOG.md#&#8203;01212-httpswwwgithubcomgoogleapisjava-datalabelingcomparev01211v01212-2021-08-23)

[Compare Source](https://togithub.com/googleapis/java-datalabeling/compare/v0.121.1...v0.121.2)

</details>

---

### Configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box.

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/java-datalabeling).

Author: renovate-bot

datalabeling/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-datalabeling</artifactId>
-      <version>0.121.1</version>
+      <version>0.121.2</version>
     </dependency>
     <!-- [END datalabeling_install_without_bom] -->
 

datalabeling/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-datalabeling</artifactId>
-      <version>0.121.1</version>
+      <version>0.121.2</version>
     </dependency>
 
     <dependency>