pre-commit: Add a hook to check YAML files

.pre-commit-config.yaml

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3745a70..1364dc5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -32,5 +32,6 @@
     rev: v5.0.0
     hooks:
       - id: check-case-conflict
+      - id: check-yaml
       - id: mixed-line-ending
       - id: trailing-whitespace