Update maintain-tests.mdx

maintain-tests.mdx

@@ -67,7 +67,7 @@ Since we dogfood our own end-to-end tests, we have discovered this easy hack:
 4. select the first step that broke
 5. confirm `generate steps`
 
-The **AI agent** will is re-generate steps of your test and validate them. If it's alright, click `save & run`. If it needs adjustment, this is [how you edit test cases](/edit-test-case.mdx).
+The **AI agent** will re-generate steps of your test and validate them. If it's alright, click `save & run`. If it needs adjustment, this is [how you edit test cases](/edit-test-case.mdx).
 
 <Tip>
   If snapshots in preview don't display properly, or the state of the run is all