Chore: Fix typo in dashboard.go (#39928)

requets -> requests

pkg/api/dashboard.go

@@ -338,7 +338,7 @@ func (hs *HTTPServer) PostDashboard(c *models.ReqContext, cmd models.SaveDashboa
 			dashboard = dash // the original request
 		}
 
-		// This will broadcast all save requets only if a `gitops` observer exists.
+		// This will broadcast all save requests only if a `gitops` observer exists.
 		// gitops is useful when trying to save dashboards in an environment where the user can not save
 		channel := hs.Live.GrafanaScope.Dashboards
 		liveerr := channel.DashboardSaved(c.SignedInUser.OrgId, c.SignedInUser.ToUserDisplayDTO(), cmd.Message, dashboard, err)