[GITEA] Make pagination test more robust (squash)

- Backport #1882
- Be more specific of which element we want and also don't include the
href into the selector, so if the value changes, it will show the value
that was rendered.
- Ensure stable order of passed repository IDs.
- Resolves codeberg.org/forgejo/forgejo/issues/1880

(cherry picked from commit 79bc4cffe5)

routers/web/user/home.go

@@ -295,6 +295,10 @@ func Milestones(ctx *context.Context) {
 		return !showRepoIds.Contains(v)
 	})
 
+	// This is to ensure that testing the expected pagination link is stable.
+	// As there's no guarantee of order.
+	slices.Sort(repoIDs)
+
 	var pagerCount int
 	if isShowClosed {
 		ctx.Data["State"] = "closed"