Update renovate.json5 to ignore codemirror@6.65.7 (#17116)

.github/renovate.json5

@@ -67,6 +67,12 @@
       groupName: "GitHub Actions",
       matchManagers: ["github-actions"],
     },
+    // Forbid codemirror@6.65.7
+    // https://github.com/prettier/prettier/pull/13171#issuecomment-1258427561
+    {
+      matchPackageNames: ["codemirror"],
+      allowedVersions: "!/^6\\.65\\.7$/",
+    },
   ],
   ignoreDeps: [
     // It's a dependency of `remark-parse`, use same version to reduce size