Refactor: Eliminate no-unsafe-return suppressions via strict type validation (#20668)

Signed-off-by: M-DEV-1 <mahadevankizhakkedathu@gmail.com>
Co-authored-by: Tommaso Sciortino <sciortino@gmail.com>

packages/cli/src/utils/gitUtils.ts

@@ -83,8 +83,7 @@ export const getLatestGitHubRelease = async (
     if (!releaseTag) {
       throw new Error(`Response did not include tag_name field`);
     }
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-    return releaseTag;
+    return typeof releaseTag === 'string' ? releaseTag : '';
   } catch (error) {
     debugLogger.debug(
       `Failed to determine latest run-gemini-cli release:`,