Update release notes and thanks file

RELEASE_NOTES.md

@@ -52,6 +52,7 @@ Plugins
 * Use `neighbor` plugin to show next and previous articles
 * Use `assets` plugin to minify CSS and JS files
 * Support for `share_post` plugin
+* Support for `multi_part` plugin
 
 Behaviour
 ---------

THANKS.md

@@ -22,6 +22,8 @@ Thanks to
 [calfzhou](https://github.com/calfzhou)
 ---------------------------------------
 
+1. He [suggested](https://github.com/talha131/pelican-elegant/issues/95) integration with `multi_part` plugin
+1. He [reported](https://github.com/talha131/pelican-elegant/issues/15) a bug in social media optimizer code
 1. He [suggested](https://github.com/talha131/pelican-elegant/issues/60) using
    `_includes` folder
 1. He [suggested](https://github.com/talha131/pelican-elegant/issues/63)