Update comment signature (#23)

Author: jhuleatt

bin/action.min.js

@@ -36,7 +36,9 @@ export async function postOrUpdateComment(
 
   const comment = {
     ...commentInfo,
-    body: commentMarkdown + "\n\n<sub>firebase-hosting-preview-action</sub>",
+    body:
+      commentMarkdown +
+      "\n\n<sub>[Firebase Hosting GitHub Action](https://github.com/marketplace/actions/deploy-to-firebase-hosting)</sub>",
   };
 
   startGroup(`Updating PR comment`);
@@ -47,7 +49,7 @@ export async function postOrUpdateComment(
       const c = comments[i];
       if (
         c.user.type === "Bot" &&
-        /<sub>[\s\n]*firebase-hosting-preview-action/.test(c.body)
+        /<sub>[\s\n]*\[Firebase Hosting GitHub Action/.test(c.body)
       ) {
         commentId = c.id;
         break;