Move revision history to v2.1.0

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>

revision-history.yaml

@@ -4,13 +4,15 @@ revisionHistory:
   # populated using the "version" that the Makefile grabs from git.  Notable
   # additions to the specification should append entries here.
   thisVersion:
-    - Fix typos in force/release examples, force takes expr not int literal.
-    - Delineate string and single-quoted/double-quoted string in grammar.
-    - Deprecate reference-first statements.
-    - Tweak grammar of 'read' to support 'read(probe(x))' as in examples.
 
   # Information about the old versions.  This should be static.
   oldVersions:
+    - version: 2.1.1
+      changes:
+      - Fix typos in force/release examples, force takes expr not int literal.
+      - Delineate string and single-quoted/double-quoted string in grammar.
+      - Deprecate reference-first statements.
+      - Tweak grammar of 'read' to support 'read(probe(x))' as in examples.
     - version: 2.0.1
       changes:
         - Clarify int/string types and their allowed usage.