fix: yml code block

mcanouil · mcanouil · commit 336d05d42fa9 · 2024-12-08T22:37:06.000+01:00
diff --git a/README.md b/README.md
@@ -48,7 +48,7 @@ format:
 
 Using [`_brand.yml`](https://posit-dev.github.io/brand-yml/) ([v1.2.0](../../releases/tag/1.2.0)):
 
-```markdown
+```yml
 brand:
   typography:
     fonts:
