Fix release workflow (#17)

* Fix release workflow

* Remove --exit-code flag

.github/workflows/prepare-release-branch.yml

@@ -30,12 +30,12 @@ jobs:
       - name: Create release branch
         run: |
           version=$(.github/scripts/get-version.sh)
-          if [[ $version =~ ^([0-9]+)\.([0-9]+)\.0$ ]]; then
+          if [[ $version =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
             release_branch_name="release/v${version}"
-            git ls-remote --exit-code --heads origin refs/heads/$release_branch_name
-            if [ "$?" == "0" ] ; then 
+            release_branch_exists=$(git ls-remote --heads origin refs/heads/$release_branch_name)
+            if [[ $release_branch_exists != "" ]] ; then
               echo "release branch $release_branch_name already exists"
-              exit 1 
+              exit 1
             fi
           else
             echo "unexpected version: $version"

CHANGELOG.md

@@ -1,3 +1,8 @@
 # Changelog
 
 ## Unreleased
+
+* Move to `io.opentelemetry.semnconv.*` package
+  ([#14](https://github.com/open-telemetry/semantic-conventions-java/pull/14))
+* Update to semantic conventions v1.21.0
+  ([#9](https://github.com/open-telemetry/semantic-conventions-java/pull/9))