chore: update changelog

Author: MeanderingProgrammer

CHANGELOG.md

@@ -2,6 +2,23 @@
 
 ## Pre-release
 
+### Features
+
+- nvim-cmp completion source [3d2dc15](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/3d2dc15542e56671dd14dfbfff63434ec21d8fcd)
+- blink.cmp completion source [3d2dc15](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/3d2dc15542e56671dd14dfbfff63434ec21d8fcd)
+- coq_nvim completion source [#258](https://github.com/MeanderingProgrammer/render-markdown.nvim/pull/258)
+  [75cdf9d](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/75cdf9d2b049f0e27440bd78cc52b39acd15cd6e)
+
+### Bug Fixes
+
+- nil check for window [#257](https://github.com/MeanderingProgrammer/render-markdown.nvim/pull/257)
+  [eb8fdac](https://github.com/MeanderingProgrammer/render-markdown.nvim/commit/eb8fdace39e6eab96037539aace272f14e40fd80)
+
+### Collaborator Shoutouts
+
+- @argizuno
+- @TheLeoP
+
 ## 7.7.0 (2024-12-07)
 
 ### Features