Fix triggering the release logic on a branch with release in its name. (#13915)

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

scripts/get_latest_release.sh

@@ -12,7 +12,7 @@ LATEST_REL=$(curl --silent "https://api.github.com/repos/$REPO_TO_USE/releases/l
 # Check if this is a release branch
 THIS_BRANCH=$(git rev-parse --abbrev-ref HEAD)
 
-if [[ "$THIS_BRANCH" =~ $BRANCH_TO_USE ]];
+if [[ $(echo "$THIS_BRANCH" | grep -c ^"$BRANCH_TO_USE") == 1 ]];
 then
     VERSION_REL=${THIS_BRANCH//$BRANCH_TO_USE/v}
     REL_TO_USE=$(curl --silent "https://api.github.com/repos/$REPO_TO_USE/releases" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed -n "/$VERSION_REL/p" | sort -rV | head -n 1)