Update config.yml

Author: tzununbekov

.circleci/config.yml

@@ -33,7 +33,7 @@ jobs:
           name: "Publish Release on GitHub"
           command: |
             go get github.com/tcnksm/ghr
-            VERSION=$(curl -sI https://github.com/triggermesh/aws-custom-runtime/releases/latest | grep "Location:" | awk -F "/" '{print $NF}' | tr -d "\r")
+            VERSION=$(curl -sI https://github.com/triggermesh/aws-custom-runtime/releases/latest | grep -i "Location:" | awk -F "/" '{print $NF}' | tr -d "\r")
             ghr -t ${GITHUB_TOKEN} -u ${CIRCLE_PROJECT_USERNAME} -r ${CIRCLE_PROJECT_REPONAME} -c ${CIRCLE_SHA1} -delete ${VERSION} /tmp/artifacts
 workflows:
   version: 2