Improve job commit description (#30579)

Fix https://github.com/go-gitea/gitea/issues/30567

When job is a schedule:

![image](https://github.com/go-gitea/gitea/assets/18380374/b07e9d43-e8b7-4ee2-87b3-a7050c3a8ca5)
When it is a normal one:

![image](https://github.com/go-gitea/gitea/assets/18380374/0d58dab9-74bb-421b-8952-0578cdf21a52)

also add a 'space' behind  `:`

![image](https://github.com/go-gitea/gitea/assets/18380374/4cebece0-bfe6-4ad9-b806-e5c49bb9be43)


![image](https://github.com/go-gitea/gitea/assets/18380374/02da7681-474b-4c0f-9dad-b6558f6cb484)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/actions/run.go

@@ -74,6 +74,13 @@ func (run *ActionRun) Link() string {
 	return fmt.Sprintf("%s/actions/runs/%d", run.Repo.Link(), run.Index)
 }
 
+func (run *ActionRun) WorkflowLink() string {
+	if run.Repo == nil {
+		return ""
+	}
+	return fmt.Sprintf("%s/actions/?workflow=%s", run.Repo.Link(), run.WorkflowID)
+}
+
 // RefLink return the url of run's ref
 func (run *ActionRun) RefLink() string {
 	refName := git.RefName(run.Ref)
@@ -156,6 +163,10 @@ func (run *ActionRun) GetPullRequestEventPayload() (*api.PullRequestPayload, err
 	return nil, fmt.Errorf("event %s is not a pull request event", run.Event)
 }
 
+func (run *ActionRun) IsSchedule() bool {
+	return run.ScheduleID > 0
+}
+
 func updateRepoRunsNumbers(ctx context.Context, repo *repo_model.Repository) error {
 	_, err := db.GetEngine(ctx).ID(repo.ID).
 		SetExpr("num_action_runs",