Bump com.squareup.okhttp3:mockwebserver from 4.11.0 to 4.12.0

Bumps [com.squareup.okhttp3:mockwebserver](https://github.com/square/okhttp) from 4.11.0 to 4.12.0.
- [Changelog](https://github.com/square/okhttp/blob/master/CHANGELOG.md)
- [Commits](square/okhttp@parent-4.11.0...parent-4.12.0)

---
updated-dependencies:
- dependency-name: com.squareup.okhttp3:mockwebserver
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

app/build.gradle

@@ -173,7 +173,7 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
     androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.5.1'
     // mock server for backend
-    androidTestImplementation 'com.squareup.okhttp3:mockwebserver:4.11.0'
+    androidTestImplementation 'com.squareup.okhttp3:mockwebserver:4.12.0'
     // Optional -- Hamcrest library
     androidTestImplementation 'org.hamcrest:hamcrest:2.2'
     androidTestImplementation 'org.hamcrest:hamcrest-library:2.2'