chore(deps): bump com.uber.nullaway:nullaway from 0.10.14 to 0.10.15

Bumps [com.uber.nullaway:nullaway](https://github.com/uber/NullAway) from 0.10.14 to 0.10.15.
- [Release notes](https://github.com/uber/NullAway/releases)
- [Changelog](https://github.com/uber/NullAway/blob/master/CHANGELOG.md)
- [Commits](uber/NullAway@v0.10.14...v0.10.15)

---
updated-dependencies:
- dependency-name: com.uber.nullaway:nullaway
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -31,7 +31,7 @@ allprojects {
         errorprone "com.google.errorprone:error_prone_core:2.21.1"
 
         // https://github.com/uber/NullAway
-        errorprone "com.uber.nullaway:nullaway:0.10.14"
+        errorprone "com.uber.nullaway:nullaway:0.10.15"
 
         // https://github.com/grpc/grpc-java-api-checker
         errorprone "io.grpc:grpc-java-api-checker:1.1.0"