Use more conventional --no-parallel flag (#428)

Author: ZacSweers

RELEASING.md

@@ -5,7 +5,7 @@ Releasing
  2. Update the `CHANGELOG.md` for the impending release.
  3. `git commit -am "Prepare for release X.Y.Z."` (where X.Y.Z is the new version)
  4. `git tag -a X.Y.Z -m "Version X.Y.Z"` (where X.Y.Z is the new version)
- 5. `./gradlew clean uploadArchives -Dorg.gradle.parallel=false`
+ 5. `./gradlew clean uploadArchives --no-parallel`
  6. Update the `gradle.properties` to the next SNAPSHOT version.
  7. `git commit -am "Prepare next development version."`
  8. `git push && git push --tags`