fix: code-block indentation (#16)

Co-authored-by: Nirmit Joshi <nirmitjoshi@users.noreply.github.com>

README.md

@@ -67,31 +67,31 @@ add flags to lazygit which will merge it from our presets.
     <details>
     <summary>config.yml</summary>
 
-    ```
+    ```yaml
     gui:
-      # Use the mocha catppuccin theme
-			theme:
-				activeBorderColor:
-					- '#89b4fa'
-					- bold
-				inactiveBorderColor:
-					- '#a6adc8'
-				optionsTextColor:
-					- '#89b4fa'
-				selectedLineBgColor:
-					- '#313244'
-				selectedRangeBgColor:
-					- '#313244'
-				cherryPickedCommitBgColor:
-					- '#45475a'
-				cherryPickedCommitFgColor:
-					- '#89b4fa'
-				unstagedChangesColor:
-					- '#f38ba8'
-				defaultFgColor:
-					- '#cdd6f4'
-				searchingActiveBorderColor:
-					- '#f9e2af'
+     # Use the mocha catppuccin theme
+     theme:
+       activeBorderColor:
+         - '#89b4fa'
+         - bold
+       inactiveBorderColor:
+         - '#a6adc8'
+       optionsTextColor:
+         - '#89b4fa'
+       selectedLineBgColor:
+         - '#313244'
+       selectedRangeBgColor:
+         - '#313244'
+       cherryPickedCommitBgColor:
+         - '#45475a'
+       cherryPickedCommitFgColor:
+         - '#89b4fa'
+       unstagedChangesColor:
+         - '#f38ba8'
+       defaultFgColor:
+         - '#cdd6f4'
+       searchingActiveBorderColor:
+         - '#f9e2af'
     ```
     </details>
 4. Close and re-open lazygit to see your new theme!