Not able to send ci/cd alert to microsoft teams with github actions

- Have created teams workflows (post to channel when receving webhook request), test the webhook in postman, but while using it with github actions not able to send alert to teams and getting below error

{"error":{"code":"DirectApiAuthorizationRequired","message":"The request must be authenticated only by Shared Access scheme."}}

have added teams workflow webhook to github secrets

below is example ci//cd step

- name: Notify on success
if: ${{ success() }}
run: |
PACKAGE_VERSION=$(npm run version --silent)
BASE_BRANCH=$(echo $GITHUB_REF | awk -F/ '{print $3}')
MERGE_COMMIT_SHA=$(git log --merges --format="%H" -n 1)
MERGE_AUTHOR=$(git show -s --format="%an" $MERGE_COMMIT_SHA)
cat << EOF > message.json
{"@type":"MessageCard","@context":"https://schema.org/extensions","summary":"Pipeline Success!","themeColor":"00FF00","title":"$GITHUB_REPOSITORY pipeline Success ✅✅ ","sections":[{"facts":[{"name":"Repository:","value":"$GITHUB_REPOSITORY"},{"name":"Branch:","value":"$GITHUB_REF_NAME"},{"name":"Package Version:","value":"$PACKAGE_VERSION"}]}],"potentialAction":[{"@type":"OpenUri","name":"View on GitHub","targets":[{"os":"default","uri":"$GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID"}]}],"text":"$MERGE_AUTHOR merged commits into $BASE_BRANCH"}
EOF
curl -X POST ${{ secrets.TEAMS_WEBHOOK_URL }} --header 'Content-Type: application/json' -d @message.json