update syntax for github action

Author: corybekk

.github/workflows/semantic-lint.yml

@@ -13,7 +13,7 @@ permissions:
 
 jobs:
   semantic-lint:
-    if: ${{ github.repository == 'ekristen/aws-nuke' }}
+    if: github.repository == 'ekristen/aws-nuke'
     runs-on: ubuntu-latest
     steps:
       - uses: amannn/action-semantic-pull-request@v5