Updated Insider SLOW (markdown)

Insider-SLOW.md

@@ -1,3 +1,10 @@
+#14393
+
+## Summary
+- No new feature additions or updates to Composition APIs
+- There are some identified issues on the Sample Gallery ([see link](https://github.com/Microsoft/WindowsUIDevLabs/wiki/Insider-FAST#sample-gallery-issues-from-sdk-14383-and-on)). The apps will be fixed/updated in the near future.
+- See [Last Know Good](./Last-Known-Good) for latest recommended configuration
+
 # 14372
 
 ## Summary