Fix netlify previews (#8330)

Update the name of the workflow in the workflow_run trigger as
it was changed when adding cypress tests.

This will upload the preview build after running the cypress tests:
unsure if this is what we want or not. The preview build will be
slower to appear, but it does sort of make sense to only get a
preview buuild if the tests pass. If not, we might be able to do
this by doing a repository dispatch after the preview build.

.github/workflows/netlify.yaml

@@ -3,7 +3,7 @@
 name: Upload Preview Build to Netlify
 on:
     workflow_run:
-        workflows: ["Layered Preview Build"]
+        workflows: ["Element Web - Build and Test"]
         types:
             - completed
 jobs: