Update CHANGES.md

- Use titles to satisfy dune
- Fix code markup markdown

CHANGES.md

@@ -1,4 +1,4 @@
-v1.0 (unreleased)
+## v1.0 (2022-09-27)
 * Switch to dune
 * Remove `Mbr_partition` and `Mbr_lwt`
 * Remove old stringly typed interface
@@ -7,14 +7,14 @@ v1.0 (unreleased)
 * Update code and slim down on dependencies
 * Handle empty partition entries
 
-v0.3 (2015-06-04)
+## v0.3 (2015-06-04)
 * Expose a `connect` function for mirage-types > 2.3
 * Fix bounds checks
 * Add unit tests
 * Fix integer overflow
 * Add opam file
 
-v0.2 (2014-08-18)
-* add Mbr_partition: V1_LWT.BLOCK, for easy access to partitions via
+## v0.2 (2014-08-18)
+* add `Mbr_partition: V1_LWT.BLOCK`, for easy access to partitions via
   the standard Mirage block interface.
-* use a polymorphic variant result type [`Ok of 'a | `Error of 'b]
+* use a polymorphic variant result type `` [`Ok of 'a | `Error of 'b]``