Auto merge of #4103 - Turbo87:renovate-lockfile, r=JohnTitor

renovate: Adjust lockfile maintenance configuration

Using `groupName` for this was incorrect and did not update the PR title in the dependency dashboard. This PR uses the `commitMessageSuffix` option instead, and also `additionalBranchPrefix` to avoid conflicting branch names.

Author: bors

.github/renovate.json

@@ -27,9 +27,15 @@
     }, {
         "matchLanguages": ["rust"],
         "rangeStrategy": "bump"
+    }, {
+        "matchLanguages": ["js"],
+        "matchUpdateTypes": ["lockFileMaintenance"],
+        "additionalBranchPrefix": "js-",
+        "commitMessageSuffix": "(JS)"
     }, {
         "matchLanguages": ["rust"],
         "matchUpdateTypes": ["lockFileMaintenance"],
-        "groupName": " Lock file maintenance (Rust)"
+        "additionalBranchPrefix": "rust-",
+        "commitMessageSuffix": "(Rust)"
     }]
 }