build(deps): update dependency org.sonatype.plugins:nexus-staging-maven-plugin to v1.6.10 (googleapis#720)

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

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.sonatype.plugins:nexus-staging-maven-plugin](http://www.sonatype.com/) ([source](https://github.com/sonatype/nexus-maven-plugins)) | `1.6.9` -> `1.6.10` | [![age](https://badges.renovateapi.com/packages/maven/org.sonatype.plugins:nexus-staging-maven-plugin/1.6.10/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/org.sonatype.plugins:nexus-staging-maven-plugin/1.6.10/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/org.sonatype.plugins:nexus-staging-maven-plugin/1.6.10/compatibility-slim/1.6.9)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/org.sonatype.plugins:nexus-staging-maven-plugin/1.6.10/confidence-slim/1.6.9)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>sonatype/nexus-maven-plugins</summary>

### [`v1.6.10`](https://github.com/sonatype/nexus-maven-plugins/compare/release-1.6.9...release-1.6.10)

[Compare Source](https://github.com/sonatype/nexus-maven-plugins/compare/release-1.6.9...release-1.6.10)

</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, click this checkbox.

---

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-resourcemanager).

Author: renovate-bot

java-resourcemanager/samples/pom.xml

@@ -46,7 +46,7 @@
       <plugin>
         <groupId>org.sonatype.plugins</groupId>
         <artifactId>nexus-staging-maven-plugin</artifactId>
-        <version>1.6.9</version>
+        <version>1.6.10</version>
         <configuration>
           <skipNexusStagingDeployMojo>true</skipNexusStagingDeployMojo>
         </configuration>