fix(github-actions): Remove old output syntax (#326)

Co-authored-by: Tonye Jack <[email protected]>

entrypoint.sh

@@ -48,29 +48,19 @@ if [[ -n "$CHANGED_FILES" ]]; then
 
   CHANGED_FILES=$(echo "$CHANGED_FILES" | awk '{gsub(/\|/,"\n"); print $0;}' | awk -v d="$INPUT_SEPARATOR" '{s=(NR==1?s:s d)$0}END{print s}')
 
-  if [[ -z "$GITHUB_OUTPUT" ]]; then
-    echo "::set-output name=files_changed::true"
-    echo "::set-output name=changed_files::$CHANGED_FILES"
-  else
-    echo "files_changed=true" >> "$GITHUB_OUTPUT"
-    echo "changed_files=$CHANGED_FILES" >> "$GITHUB_OUTPUT"
-  fi
+  echo "files_changed=true" >> "$GITHUB_OUTPUT"
+  echo "changed_files=$CHANGED_FILES" >> "$GITHUB_OUTPUT"
 
   if [[ "$INPUT_FAIL_IF_CHANGED" == "true" ]]; then
     if [[ -n "$INPUT_FAIL_MSG" ]]; then
-      echo "$INPUT_FAIL_MSG"
+      echo "::error::$INPUT_FAIL_MSG"
     fi
     exit 1
   fi
 
 else
   echo "No changes found."
-
-  if [[ -z "$GITHUB_OUTPUT" ]]; then
-    echo "::set-output name=files_changed::false"
-  else
-    echo "files_changed=false" >> "$GITHUB_OUTPUT"
-  fi
+  echo "::set-output name=files_changed::false"
 fi
 
 echo "::endgroup::"