fix: bump diff from ^5.2.0 to ^7.0.0 (#5348)

Author: JoshuaKGoldberg

package-lock.json

@@ -99,7 +99,7 @@
     "browser-stdout": "^1.3.1",
     "chokidar": "^4.0.1",
     "debug": "^4.3.5",
-    "diff": "^5.2.0",
+    "diff": "^7.0.0",
     "escape-string-regexp": "^4.0.0",
     "find-up": "^5.0.0",
     "glob": "^10.4.5",