Added github user IDs for BCR Publish (#3388)

Relates to
bazelbuild/bazel-central-registry#4191

Author: UebelAndre

.bcr/metadata.template.json

@@ -2,22 +2,27 @@
   "homepage": "https://github.com/bazelbuild/rules_rust",
   "maintainers": [
     {
-        "email": "26427366+UebelAndre@users.noreply.github.com",
-        "github": "UebelAndre",
-        "name": "UebelAndre"
+      "email": "26427366+UebelAndre@users.noreply.github.com",
+      "github": "UebelAndre",
+      "github_user_id": "26427366",
+      "name": "UebelAndre"
     },
     {
       "email": "1131704+illicitonion@users.noreply.github.com",
       "github": "illicitonion",
+      "github_user_id": "1131704",
       "name": "Daniel Wagner-Hall"
     },
     {
       "email": "11149636+scentini@users.noreply.github.com",
       "github": "scentini",
+      "github_user_id": "11149636",
       "name": "Rosica Dejanovska"
     }
   ],
-  "repository": ["github:bazelbuild/rules_rust"],
+  "repository": [
+    "github:bazelbuild/rules_rust"
+  ],
   "versions": [],
   "yanked_versions": {}
 }