deps: update dependency com.google.cloud:google-cloud-debugger-client-bom to v1.2.1 (#4530)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-debugger-client-bom](https://togithub.com/googleapis/java-debugger-client) | `1.2.0` -> `1.2.1` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-debugger-client-bom/1.2.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-debugger-client-bom/1.2.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-debugger-client-bom/1.2.1/compatibility-slim/1.2.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-debugger-client-bom/1.2.1/confidence-slim/1.2.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-debugger-client</summary>

### [`v1.2.1`](https://togithub.com/googleapis/java-debugger-client/blob/HEAD/CHANGELOG.md#&#8203;121-httpsgithubcomgoogleapisjava-debugger-clientcomparev120v121-2022-06-23)

[Compare Source](https://togithub.com/googleapis/java-debugger-client/compare/v1.2.0...v1.2.1)

##### Dependencies

-   update dependency com.google.cloud:google-cloud-shared-dependencies to v2.13.0 ([#&#8203;195](https://togithub.com/googleapis/java-debugger-client/issues/195)) ([2e5957b](https://togithub.com/googleapis/java-debugger-client/commit/2e5957b49395900103191392b068e5574aa22034))

</details>

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Author: renovate-bot

google-cloud-bom/pom.xml

@@ -373,7 +373,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-debugger-client-bom</artifactId>
-        <version>1.2.0</version>
+        <version>1.2.1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>