forgotten double-colons

Author: Cory Schwartz

entrypoint.sh

@@ -11,7 +11,7 @@ FAILURE=1
 # Note that if you echo these strings, they will not be visible in the action log.
 OUTPUT_STATUS="::set-output name=status::"
 OUTPUT_OUTCOME="::set-output name=outcome::"
-OUTPUT_ID="::set-output name=testground_id"
+OUTPUT_ID="::set-output name=testground_id::"
 
 BACKEND="${INPUT_BACKEND_PROTO}"'://'"${INPUT_BACKEND_ADDR}"