[GH-19267] Spelling comments (#19268)

* spelling: comments

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/post_test.go

@@ -2680,7 +2680,7 @@ func TestSetPostUnreadWithoutCollapsedThreads(t *testing.T) {
 	// user2: first root mention @user1
 	//   - user1: hello
 	//   - user2: mention @u1
-	//   - user1: another repoy
+	//   - user1: another reply
 	//   - user2: another mention @u1
 	// user1: a root post
 	// user2: Another root mention @u1