treefmt: format markdown

- ignore markdown table

docs/README.md

@@ -51,6 +51,7 @@ If you need to contact the nix-community admins, they are listed [here](https://
 
 Thanks to all our sponsors.
 
+<!-- prettier-ignore-start -->
 |[<img src="https://raw.githubusercontent.com/cachix/docs.cachix.org/master/source/logo.png" width="200" alt="Cachix">](https://cachix.org)|
 |:-:|
 |Cachix provides us with 1TB of free cache|
@@ -58,3 +59,4 @@ Thanks to all our sponsors.
 |[<img src="https://raw.githubusercontent.com/Gandi/.github/b1f21a402d9223c672476b41148429f538be5303/logos/black.svg" width="200" alt="Gandi">](https://www.gandi.net/)|
 |:-:|
 |Gandi provides us with a free domain.|
+<!-- prettier-ignore-end -->

treefmt.nix

@@ -35,7 +35,6 @@
 
         prettier = {
           excludes = [
-            "*.md"
             "secrets.yaml"
           ];
         };