fix: markdown headings in CHANGELOG (#336)

Author: kbdharun

CHANGELOG.md

@@ -6,12 +6,12 @@
 
 * Drop support for EOL Python 3.9 version (thanks [@kyluca](https://github.com/kyluca)).
 
-## Bugfixes
+### Bugfixes
 
 * Fixed unexpected behavior by only raising URLError or HTTPError when there are no results at all (thanks [@kyluca](https://github.com/kyluca)).
 * Return exit code 1 when search finds no results (thanks [@gowtham1412-p](https://github.com/gowtham1412-p)).
 
-## Features
+### Features
 
 * Added support for Python 3.14 (thanks [@kyluca](https://github.com/kyluca), [@kbdharun](https://github.com/kbdharun), [@sebastiaanspeck](https://github.com/sebastiaanspeck)).
 * Allow cache updating and command displaying on the same command (thanks [@Managor](https://github.com/Managor)).