fix: don't autoclose infracost-autofix prs

updates autoclose logic so we don't autofix them

Author: hugorut

.github/workflows/autoclose.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   auto_close_pr:
     runs-on: ubuntu-latest
-    if: github.repository == 'infracost/example-terraform'
+    if: github.repository == 'infracost/example-terraform' && github.event.pull_request.user.login != 'infracost-autofix[bot]'
     steps:
     - uses: imba-tjd/auto-close-pr-action@master
       with: