docs: update .all-contributorsrc [skip ci]

Author: allcontributors[bot]

Diff for: .all-contributorsrc

@@ -458,6 +458,15 @@
         "mentoring",
         "review"
       ]
+    },
+    {
+      "login": "rtilling",
+      "name": "rtilling",
+      "avatar_url": "https://avatars.githubusercontent.com/u/52253385?v=4",
+      "profile": "https://github.com/rtilling",
+      "contributions": [
+        "ideas"
+      ]
     }
   ],
   "contributorsPerLine": 7,