Add missing "commands"

Author: GuillaumeGomez

highfive/configs/rust-lang/rust.json

@@ -39,18 +39,24 @@
     "mentions": {
         "src/librustdoc/html/static": {
             "message": "Some changes occurred in HTML/CSS/JS.",
+            "command": "@highfive: run-doc-ui",
             "reviewers": ["@GuillaumeGomez"]
         },
         "src/librustdoc/html/static/themes": {
             "message": "Some changes occurred in HTML/CSS themes.",
+            "command": "@highfive: run-doc-ui",
             "reviewers": ["@GuillaumeGomez"]
         },
-        "src/src/doc": {
+        "src/doc": {
             "message": "Some changes occurred in HTML/CSS.",
             "reviewers": ["@GuillaumeGomez"]
         },
+        "src/librustdoc/": {
+            "command": "@highfive: run-doc-ui"
+        },
         "error_codes.rs": {
             "message": "Some changes occurred in diagnostic error codes",
+            "command": "@highfive: run-doc-ui",
             "reviewers": ["@GuillaumeGomez"]
         }
     },