deps: update dependency com.google.errorprone:error_prone_core to v2.12.1 (#701)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.errorprone:error_prone_core](https://errorprone.info) ([source](https://togithub.com/google/error-prone)) | `2.11.0` -> `2.12.1` | [![age](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.12.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.12.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.12.1/compatibility-slim/2.11.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.errorprone:error_prone_core/2.12.1/confidence-slim/2.11.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>google/error-prone</summary>

### [`v2.12.1`](https://togithub.com/google/error-prone/releases/v2.12.1)

[Compare Source](https://togithub.com/google/error-prone/compare/v2.12.0...v2.12.1)

-   This release adds an infrastructure optimization to `AppliedFix` source code processing.

-   [Release Diff: v2.12.0...v2.12.1](https://togithub.com/google/error-prone/compare/v2.12.0...v2.12.1).

### [`v2.12.0`](https://togithub.com/google/error-prone/releases/v2.12.0)

[Compare Source](https://togithub.com/google/error-prone/compare/v2.11.0...v2.12.0)

New checks

-   [`BoxedPrimitiveEquality`](http://errorprone.info/bugpattern/BoxedPrimitiveEquality)
-   [`DoubleBraceInitialization`](http://errorprone.info/bugpattern/DoubleBraceInitialization)
-   [`IgnoredPureGetter`](http://errorprone.info/bugpattern/IgnoredPureGetter)
-   [`LockOnBoxedPrimitive`](http://errorprone.info/bugpattern/LockOnBoxedPrimitive)
-   [`IncorrectMainMethod`](http://errorprone.info/bugpattern/IncorrectMainMethod)
-   [`LongDoubleConversion`](http://errorprone.info/bugpattern/LongDoubleConversion)
-   [`RobolectricShadowDirectlyOn`](http://errorprone.info/bugpattern/RobolectricShadowDirectlyOn)
-   [`StaticAssignmentOfThrowable`](http://errorprone.info/bugpattern/StaticAssignmentOfThrowable)
-   [`UnnecessaryLongToIntConversion`](http://errorprone.info/bugpattern/UnnecessaryLongToIntConversion)
-   [`Varifier`](http://errorprone.info/bugpattern/Varifier)

Fixed issues: [#&#8203;58](https://togithub.com/google/error-prone/issues/58), [#&#8203;65](https://togithub.com/google/error-prone/issues/65), [#&#8203;1327](https://togithub.com/google/error-prone/issues/1327), [#&#8203;1654](https://togithub.com/google/error-prone/issues/1654), [#&#8203;2858](https://togithub.com/google/error-prone/issues/2858), [#&#8203;2867](https://togithub.com/google/error-prone/issues/2867), [#&#8203;2916](https://togithub.com/google/error-prone/issues/2916), [#&#8203;2951](https://togithub.com/google/error-prone/issues/2951), [#&#8203;2954](https://togithub.com/google/error-prone/issues/2954), [#&#8203;3006](https://togithub.com/google/error-prone/issues/3006), [#&#8203;3008](https://togithub.com/google/error-prone/issues/3008)

**Full Changelog**: google/error-prone@v2.11.0...v2.12.0

</details>

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Author: renovate-bot

pom.xml

@@ -143,7 +143,7 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-datastore-parent</site.installationModule>
     <project.javadoc.protobufBaseURL>https://googleapis.dev/java/google-api-grpc/latest</project.javadoc.protobufBaseURL>
-    <error-prone.version>2.11.0</error-prone.version>
+    <error-prone.version>2.12.1</error-prone.version>
   </properties>
 
   <dependencyManagement>