group GitHub Actions updates by type

renovate.json

@@ -31,6 +31,16 @@
         "commons-**",
         "org.apache.commons:**"
       ]
+    },
+    {
+      "groupName": "github actions (minor/patch)",
+      "matchManagers": ["github-actions"],
+      "matchUpdateTypes": ["minor", "patch"]
+    },
+    {
+      "groupName": "github actions (major)",
+      "matchManagers": ["github-actions"],
+      "matchUpdateTypes": ["major"]
     }
   ]
 }