docs: align the examples (typicode#992)

The "Locally installed binaries" section was missing a `# or` comment between the `npx` and `yarn` example. I brought the comment directly from the "HUSKY_GIT_PARAMS" section.

docs/README.md

@@ -438,6 +438,7 @@ If you were calling directly locally installed binaries, **you need to run them
 # .husky/pre-commit (v6)
 # ...
 npx --no-install jest
+# or
 yarn jest
 ```