refactor: sort fileMatch result for deterministic ordering

lib/workers/repository/extract/__snapshots__/file-match.spec.ts.snap

@@ -26,14 +26,14 @@ Array [
 
 exports[`workers/repository/extract/file-match getMatchingFiles() deduplicates 1`] = `
 Array [
-  "package.json",
   "frontend/package.json",
+  "package.json",
 ]
 `;
 
 exports[`workers/repository/extract/file-match getMatchingFiles() returns npm files 1`] = `
 Array [
-  "package.json",
   "frontend/package.json",
+  "package.json",
 ]
 `;

lib/workers/repository/extract/file-match.ts

@@ -61,5 +61,5 @@ export async function getMatchingFiles(
     );
   }
   // filter out duplicates
-  return [...new Set(matchedFiles)];
+  return [...new Set(matchedFiles)].sort();
 }