fix(ci): correct syntax in version determination script

- Resolve unexpected token error in version bump logic
- Adjust variable usage for compatibility with bash syntax
- Ensure consistent use of 'v' prefix when checking existing tags

This commit fixes a syntax error in the automated versioning script,
allowing the release workflow to run successfully.

.github/workflows/release.yml

@@ -77,20 +77,21 @@ jobs:
 
           git log ${LATEST_TAG}..HEAD --pretty=format:%s > commits.txt
           if grep -q '^BREAKING CHANGE:' commits.txt || grep -q '^[a-zA-Z]\+!:' commits.txt; then
-            echo "BUMP=major" >> $GITHUB_OUTPUT
+            BUMP="major"
           elif grep -q '^feat:' commits.txt; then
-            echo "BUMP=minor" >> $GITHUB_OUTPUT
+            BUMP="minor"
           else
-            echo "BUMP=patch" >> $GITHUB_OUTPUT
+            BUMP="patch"
           fi
+          echo "BUMP=${BUMP}" >> $GITHUB_OUTPUT
 
           LATEST_VERSION=${LATEST_TAG#v}
           IFS='.' read -ra VERSION_PARTS <<< "$LATEST_VERSION"
           MAJOR=${VERSION_PARTS[0]:-0}
           MINOR=${VERSION_PARTS[1]:-0}
           PATCH=${VERSION_PARTS[2]:-0}
 
-          case ${{ steps.determine_version.outputs.BUMP }} in
+          case $BUMP in
             major)
               NEW_VERSION="$((MAJOR + 1)).0.0"
               ;;
@@ -104,8 +105,8 @@ jobs:
           echo "NEW_VERSION=v${NEW_VERSION}" >> $GITHUB_OUTPUT
 
           # Check if the calculated version already exists
-          if git rev-parse $NEW_VERSION >/dev/null 2>&1; then
-            echo "Version $NEW_VERSION already exists. Incrementing patch version."
+          if git rev-parse v$NEW_VERSION >/dev/null 2>&1; then
+            echo "Version v$NEW_VERSION already exists. Incrementing patch version."
             PATCH=$((PATCH + 1))
             NEW_VERSION="${MAJOR}.${MINOR}.${PATCH}"
             echo "NEW_VERSION=v${NEW_VERSION}" >> $GITHUB_OUTPUT