docs: format release notes

Signed-off-by: NotAShelf <[email protected]>
Change-Id: I2bce19ea88f12af67baa4d777af287dd6a6a6964

Author: NotAShelf

docs/manual/release-notes/rl-0.9.md

@@ -22,8 +22,8 @@
 
   Some other settings and commands are now deprecated but are still supported.
 
-  - The `setupOpts.mappings` options were also removed. Use the built-in
-    Neovim settings (nvf's {option}`vim.keymaps`)
+  - The `setupOpts.mappings` options were also removed. Use the built-in Neovim
+    settings (nvf's {option}`vim.keymaps`)
 
 ## Changelog {#sec-release-0-9-changelog}
 
@@ -69,7 +69,8 @@
 
 [jtliang24](https://github.com/jtliang24):
 
-- Updated nix language plugin to use pkgs.nixfmt instead of pkgs.nixfmt-rfc-style
+- Updated nix language plugin to use pkgs.nixfmt instead of
+  pkgs.nixfmt-rfc-style
 
 [alfarel](https://github.com/alfarelcynthesis):