chore(docs): lowercase `Kind` for clarity

`Kind` being upper case makes it seem like we're referrring to
the Kind field of a Kubernetes resource but we're really talking
about the kind of helm hook in this case.
resolves #4302

docs/charts_hooks.md

@@ -183,8 +183,7 @@ deterministic executing order. Weights are defined using the following annotatio
 ```
 
 Hook weights can be positive or negative numbers but must be represented as
-strings. When Tiller starts the execution cycle of hooks of a particular Kind it
-will sort those hooks in ascending order. 
+strings. When Tiller starts the execution cycle of hooks of a particular kind (ex. the `pre-install` hooks or `post-install` hooks, etc.) it will sort those hooks in ascending order.
 
 It is also possible to define policies that determine when to delete corresponding hook resources. Hook deletion policies are defined using the following annotation: