scaffolder: remove undefined from the title of Scaffolder Run page

Signed-off-by: Himanshu Mishra <himanshu@orkohunter.net>

.changeset/real-lizards-sit.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder': patch
+---
+
+Fix undefined in the title of Scaffolder Runs on the page load

plugins/scaffolder/src/components/OngoingTask/OngoingTask.tsx

@@ -173,7 +173,9 @@ export const OngoingTask = (props: {
   return (
     <Page themeId="website">
       <Header
-        pageTitleOverride={`Run of ${templateName}`}
+        pageTitleOverride={
+          templateName ? `Run of ${templateName}` : `Scaffolder Run`
+        }
         title={
           <div>
             Run of <code>{templateName}</code>