fix syntax

Author: LucHeart

.github/actions/cdn-bump-version/action.yml

@@ -38,4 +38,4 @@ runs:
       run: |
         curl -X POST "https://api.bunny.net/purge?url=${{ inputs.bunny-cdn-url }}/version-${{ inputs.release-channel }}.txt" \
           -H "Content-Type: application/json" \
-          -H "AccessKey: ${{ input.bunny-api-key }}"
+          -H "AccessKey: ${{ inputs.bunny-api-key }}"