Update v0.13.0 Changelog (#176)

* updated .changelog to mention the removal of boltdb and cleveldb

* updated .changelog to mention the removal of boltdb and cleveldb

* Improved formatting

Co-authored-by: Anton Kaliaev <[email protected]>

* added date to changelog

* deleted commented out lines in summary.md

---------

Co-authored-by: Anton Kaliaev <[email protected]>

.changelog/v0.13.0/breaking-changes/155-remove-bolt-cleveldb.md

@@ -0,0 +1 @@
+- removed deprecated boltdb and cleveldb ([\#155](https://github.com/cometbft/cometbft-db/pull/155))

.changelog/v0.13.0/summary.md

@@ -1,7 +1,5 @@
-<!--
-    Add a summary for the release here.
+*Aug 2, 2024*
 
-    If you don't change this message, or if this file is empty, the release
-    will not be created. -->
-This release changes the contract of the Iterator Key() and Value() APIs.
-Namely, the caller is now responsible for creating a copy of their returned value if they want to modify it.
+This release:
+- changes the contract of the Iterator Key() and Value() APIs. Namely, the caller is now responsible for creating a copy of their returned value if they want to modify it.
+- removes support for boltDB and clevelDB, which were marked as deprecated in release v0.12.0.

CHANGELOG.md

@@ -2,13 +2,20 @@
 
 ## v0.13.0
 
+*Aug 2, 2024*
+
 This release:
 - changes the contract of the Iterator Key() and Value() APIs: the caller
 is now responsible for creating a copy of their returned value if they want to modify it.
 - bumps the Go version to 1.22.5 (from 1.22). Go 1.22.5 does not introduce new language
 features, therefore code using older version will still compile. However, we recommend to
 upgrade to the latest version(s) of Go as soon as possible.
+- removes support for boltDB and clevelDB.
+
+
+### BREAKING CHANGES
 
+- removed deprecated boltdb and cleveldb ([\#155](https://github.com/cometbft/cometbft-db/pull/155))
 
 ### FEATURES