fix(review-agent): satisfy diff response typing

Author: BashOpsDev

packages/web/src/features/agents/review-agent/nodes/githubPrParser.ts

@@ -23,7 +23,7 @@ export const githubPrParser = async (octokit: Octokit, pullRequest: GitHubPullRe
         },
     });
 
-    parsedDiff = parse(diff.data as string);
+    parsedDiff = parse(diff.data as unknown as string);
 } catch (error) {
     logger.error("Error fetching diff: ", error);
     throw error;