Add merged Generics doc PR to the release notes

Author: quark17

release/ReleaseNotes.adoc

@@ -18,7 +18,13 @@ Documentation
   ** Additional links to documentation
   ** Link to Repology search for Bluespec packages
 
-* Fix typos in the BSV Reference Guide
+* Document string types in the BH and BSV Reference Guides
+
+* Document the Generics feature and associated types and type class in
+  the Libraries Reference Guide
+
+* Minor cleanups and typo fixes in the BH and BSV Reference Guides and
+  Libraries Reference Guide
 
 Compiler
 ~~~~~~~~
@@ -34,6 +40,9 @@ Compiler
      compiler on designs with large enums
      (GitHub issue #334, discussion #414)
 
+* Remove the warning on uses of `Generic` that the feature is
+  experimental, now that the implementation has settled
+
 * Use UTF-8 instead of ISO-8859-1 for all text-like I/O (GitHub PR #601)
   ** Source files can now include non-Latin characters!
 
@@ -73,6 +82,8 @@ Libraries
   ** Polymorphic uses of the `FixedPoint` type may need to add `Min`
      provisos (see GitHub PR #634 for example updates in the testsuite)
 
+* Add a CShow generic instance for higher-rank fields
+
 Bluetcl
 ~~~~~~~