build(deps): bump gradle-wrapper from 6.9 to 6.9.4

Bumps gradle-wrapper from 6.9 to 6.9.4.

---
updated-dependencies:
- dependency-name: gradle-wrapper
  dependency-version: 6.9.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.9.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists