Fix new comment tags to overwrite old comments

For a better migration story ensure the old style comment tags are
captured to avoid stale comments on PRs.

dist/index.js

@@ -45608,6 +45608,9 @@ async function downloadBuf(version) {
 // limitations under the License.
 
 
+// oldCommentTag is the previous tag used to identify the comment. This is
+// temporary and will be removed in a future release.
+const oldCommentTag = "<!-- Buf results -->";
 // commentTag returns the tag used to identify the comment. This is a non-visible
 // string injected into the comment body. It is unique to the workflow and job.
 function commentTag() {
@@ -45628,7 +45631,10 @@ async function findCommentOnPR(context, github) {
         repo: repo,
         issue_number: prNumber,
     });
-    const previousComment = comments.find((comment) => comment.body?.includes(commentTag()));
+    const tag = commentTag();
+    const previousComment = comments.find((comment) => 
+    // TODO: Remove the old comment tag check in a future release.
+    comment.body?.includes(tag) || comment.body?.includes(oldCommentTag));
     if (previousComment) {
         core.info(`Found previous comment ${previousComment.id}`);
         return previousComment.id;

src/comment.ts

@@ -17,6 +17,10 @@ import { context } from "@actions/github";
 import { Context } from "@actions/github/lib/context";
 import { GitHub } from "@actions/github/lib/utils";
 
+// oldCommentTag is the previous tag used to identify the comment. This is
+// temporary and will be removed in a future release.
+const oldCommentTag = "<!-- Buf results -->";
+
 // commentTag returns the tag used to identify the comment. This is a non-visible
 // string injected into the comment body. It is unique to the workflow and job.
 function commentTag(): string {
@@ -41,8 +45,11 @@ export async function findCommentOnPR(
     repo: repo,
     issue_number: prNumber,
   });
-  const previousComment = comments.find((comment) =>
-    comment.body?.includes(commentTag()),
+  const tag = commentTag();
+  const previousComment = comments.find(
+    (comment) =>
+      // TODO: Remove the old comment tag check in a future release.
+      comment.body?.includes(tag) || comment.body?.includes(oldCommentTag),
   );
   if (previousComment) {
     core.info(`Found previous comment ${previousComment.id}`);