deps: update dependency io.grafeas:grafeas to v1.2.1 (#587)

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This PR contains the following updates:

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

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### Release Notes

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

### [`v1.2.1`](https://togithub.com/googleapis/java-grafeas/blob/master/CHANGELOG.md#&#8203;121-httpswwwgithubcomgoogleapisjava-grafeascomparev120v121-2021-05-31)

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

</details>

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Author: renovate-bot

pom.xml

@@ -105,7 +105,7 @@
       <dependency>
         <groupId>io.grafeas</groupId>
         <artifactId>grafeas</artifactId>
-        <version>1.2.0</version>
+        <version>1.2.1</version>
       </dependency>
       <!-- TODO: Until gax-grpc && grafeas align  -->