fix: replace heredoc with printf to avoid YAML indent break

factorio-mod-push/action.yml

@@ -10,7 +10,7 @@ inputs:
     description: Semver version string to set in info.json, e.g. 1.0.1
     required: true
   factorio-token:
-    description: Factorio API key with ModPortal: Upload Mods permission
+    description: "Factorio API key with ModPortal: Upload Mods permission"
     required: true
 
 outputs:
@@ -51,11 +51,7 @@ runs:
         if [ ! -f "$MOD_FOLDER/README.md" ]; then
           TITLE=$(sed -n 's/.*"title": *"\([^"]*\)".*/\1/p' "$MOD_FOLDER/info.json")
           DESC=$(sed -n 's/.*"description": *"\([^"]*\)".*/\1/p' "$MOD_FOLDER/info.json")
-          cat > "$MOD_FOLDER/README.md" <<- EOF
-# $TITLE
-
-$DESC
-EOF
+          printf '# %s\n\n%s\n' "$TITLE" "$DESC" > "$MOD_FOLDER/README.md"
           echo "Created $MOD_FOLDER/README.md"
         fi