Update rust.yml

Author: panayang

.github/workflows/rust.yml

@@ -3,14 +3,16 @@
   "on": {
     "push": {
       "branches": [
-        "trunk",
+        "trunk",
+        "main",
         "v*.x",
         "ci/*"
       ]
     },
     "pull_request": {
       "branches": [
-        "trunk",
+        "trunk",
+        "main",
         "v*.x"
       ]
     }