Try with minimal quotation marks in echo

Author: mpilgrem

.github/workflows/integration-tests.yml

@@ -112,7 +112,7 @@ jobs:
       run: |
         echo "::set-output name=runners::$SELF_HOSTED_RUNNERS"
         if echo "$SELF_HOSTED_RUNNERS" | grep -q 'arm64'; then
-          echo '::set-output name=arm64::"[self-hosted, linux, ARM64]"'
+          echo "::set-output name=arm64::[self-hosted, linux, ARM64]"
         else
           echo '::set-output name=arm64::"ubuntu-latest"'
         fi