Update autolabeler workflow again (TurboWarp#1868)

Author: GarboMuffin

.github/workflows/label.yml

@@ -12,6 +12,9 @@ jobs:
   label-pull-request:
     runs-on: ubuntu-latest
 
+    # This workflow is not useful to forks without significantly updating the workflow script.
+    if: ${{ github.repository == 'TurboWarp/extensions' }}
+
     permissions:
       pull-requests: write
 
@@ -32,20 +35,20 @@ jobs:
 
           if [[ "$BASE_REF" == "master" ]]; then
             # Download just the diff so it is harder to accidentally run any code from the pull request.
-            gh pr diff --repo TurboWarp/desktop "$PR_NUMBER" > pr.diff
+            gh pr diff --repo TurboWarp/extensions "$PR_NUMBER" > pr.diff
 
             # Note that pcregrep exits with success on any match, failure on no match
             if pcregrep -M "^--- /dev/null\n\+\+\+ b/extensions/" pr.diff; then
               # Example:
               # --- /dev/null
               # +++ b/extensions/DangoCat/extension.js
-              gh pr edit --repo TurboWarp/desktop "$PR_NUMBER" --add-label "$LABEL_NEW_EXTENSION"
+              gh pr edit --repo TurboWarp/extensions "$PR_NUMBER" --add-label "$LABEL_NEW_EXTENSION"
               got_any_specific_label=true
             elif pcregrep "^\+\+\+ b/extensions/" pr.diff; then
               # Example:
               # --- a/extensions/DangoCat/extension.js
               # +++ b/extensions/DangoCat/extension.js
-              gh pr edit --repo TurboWarp/desktop "$PR_NUMBER" --add-label "$LABEL_CHANGE_EXTENSION"
+              gh pr edit --repo TurboWarp/extensions "$PR_NUMBER" --add-label "$LABEL_CHANGE_EXTENSION"
               got_any_specific_label=true
             fi
           else
@@ -54,7 +57,7 @@ jobs:
 
           # Any PR that didn't get a specific label will go into other, for a human to look at.
           if [[ "$got_any_specific_label" == "false" ]]; then
-            gh pr edit --repo TurboWarp/desktop "$PR_NUMBER" --add-label "$LABEL_OTHER"
+            gh pr edit --repo TurboWarp/extensions "$PR_NUMBER" --add-label "$LABEL_OTHER"
           fi
         env:
           PR_NUMBER: "${{ github.event.number }}"