Update makefile.yml

Trying to only run AWS stuff if PR (not sure what happens if it's a push to an existing PR, see https://stackoverflow.com/questions/66205887/only-run-github-actions-step-if-not-a-pull-request)

Author: jpolitz

.github/workflows/makefile.yml

@@ -27,10 +27,12 @@ jobs:
         aws-region: us-east-1
         aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
         aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      if: github.event_name != 'pull_request'
 
     - name: S3 test
       run: |
         aws s3 ls s3://pyret-horizon/new-horizons
+      if: github.event_name != 'pull_request'
 
     - name: Install Chrome and ChromeDriver
       run: |
@@ -117,4 +119,4 @@ jobs:
     - name: Copy cpo-main and related JS to S3
       run: |
         aws s3 sync ./build/web/js s3://pyret-horizon/horizon-action-test --acl public-read --exclude "*" --include "cpo-main.jarr.gz.js" --content-encoding gzip
-        aws s3 sync ./build/web/js s3://pyret-horizon/horizon-action-test --acl public-read --exclude "cpo-main.jarr.js.gz"
+        aws s3 sync ./build/web/js s3://pyret-horizon/horizon-action-test --acl public-read --exclude "cpo-main.jarr.js.gz"