Fix repo name

Author: vkucera

.github/workflows/o2-linter.yml

@@ -25,7 +25,7 @@ jobs:
             branch_base="origin/${{ env.BRANCH_MAIN }}"
           else
             branch_head="refs/pull/${{ github.event.pull_request.number }}/merge"
-            branch_base="${{ github.event.pull_request.base.ref }}"
+            branch_base="origin/${{ github.event.pull_request.base.ref }}"
           fi
           echo BRANCH_HEAD="$branch_head" >> "$GITHUB_ENV"
           echo BRANCH_BASE="$branch_base" >> "$GITHUB_ENV"