Release 5.0.0-alpha-6: update versions

Author: paulk-asert

gradle.properties

@@ -13,9 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-groovyVersion=5.0.0-SNAPSHOT
+groovyVersion=5.0.0-alpha-6
 # bundle version format: major('.'minor('.'micro('.'qualifier)?)?)? (first 3 only digits)
-groovyBundleVersion=5.0.0.SNAPSHOT
+groovyBundleVersion=5.0.0.alpha-6
 
 groovyTargetBytecodeVersion=11
 targetJavaVersion=11