pre-commit trailing-whitespace check more file types (#302)

.pre-commit-config.yaml

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7cfbf9a..8a2b6d2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,4 +19,4 @@
     - id: forbid-submodules
     - id: mixed-line-ending
     - id: trailing-whitespace
-      files: \.(cgi|rdf|rb)$
+      files: \.(cgi|html|json|py|rb|rdf|sh|ya?ml)$