Update update-prefixes.yml

Resolves #320

.github/workflows/update-prefixes.yml

@@ -1,6 +1,6 @@
 name: CSS prefixes
 
-# Controls when the action will run. 
+# Controls when the action will run.
 on:
   schedule:
     # * is a special character in YAML so you have to quote this string
@@ -61,12 +61,12 @@ jobs:
         with:
           source_branch: "prefixes-update"  # see above
           destination_branch: "devel"
-          
+
           # When you use the repository's GITHUB_TOKEN to perform tasks on behalf of the GitHub Actions app,
           # events triggered by the GITHUB_TOKEN will not create a new workflow run.
           #
           # Use a repo scoped Personal Access Token (PAT) created on an account that has write access
-          # to the repository that pull requests are being created in. 
+          # to the repository that pull requests are being created in.
           #
           # https://github.com/peter-evans/create-pull-request/blob/master/docs/concepts-guidelines.md#triggering-further-workflow-runs
           github_token: ${{ secrets.PAT_TOKEN }}