fix: Remove invalid colon in bash else statement

- Fix bash syntax error in auto-version workflow
- Remove Python-style colon from else statement
- Resolves exit code 127 in version bump determination

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/auto-version.yml

@@ -57,7 +57,7 @@ jobs:
           echo "Detected non-versioned change - no version bump"
           echo "bump_type=none" >> $GITHUB_OUTPUT
           echo "should_bump=false" >> $GITHUB_OUTPUT
-        else:
+        else
           echo "No recognized prefix - no version bump"
           echo "bump_type=none" >> $GITHUB_OUTPUT
           echo "should_bump=false" >> $GITHUB_OUTPUT