ci: update theme stale close message

Author: rickstaa

scripts/close-stale-theme-prs.js

@@ -10,7 +10,7 @@ import { RequestError } from "@octokit/request-error";
 import { getGithubToken, getRepoInfo } from "./helpers.js";
 
 const CLOSING_COMMENT = `
-	\rThis PR has been automatically closed due to inactivity. Please feel free to reopen it if you need to continue working on it.\
+	\rThis theme PR has been automatically closed due to inactivity. Please reopen it if you need to continue working on it.\
 	\rThank you for your contributions.
 `;
 const REVIEWER = "github-actions[bot]";