[docs] fix some typos and markdown issues on helm documentation (#4867)

* fixes `go build` on windows

cmd\cnbBuild.go:589:3: unknown field Credential in struct literal of
type "syscall".SysProcAttr
cmd\cnbBuild.go:589:24: undefined: syscall.Credential

* Update cnbBuildAttr.go

* Update cnbBuildAttr_windows.go

* go fmt

* fix some typos and markdown issues

resources/metadata/helmExecute.yaml

@@ -7,8 +7,8 @@ metadata:
  Executes helm functionality as the package manager for Kubernetes.
 
  * [Helm](https://helm.sh/) is the package manager for Kubernetes.
- * [Helm documentation https://helm.sh/docs/intro/using_helm/ and best practies https://helm.sh/docs/chart_best_practices/conventions/]
- * [Helm Charts] (https://artifacthub.io/)
+ * [Helm documentation](https://helm.sh/docs/intro/using_helm/) and [best practices](https://helm.sh/docs/chart_best_practices/conventions/)
+ * [Helm Charts](https://artifacthub.io/)
  ```
  Available Commands:
  `upgrade`, `lint`, `install`, `test`, `uninstall`, `dependency`, `publish`
@@ -18,8 +18,8 @@ metadata:
  install install a chart
  test run tests for a release
  uninstall uninstall a release
- dependency  package a chart directory into a chart archive
- publish package and puslish a release
+ dependency package a chart directory into a chart archive
+ publish package and publish a release
 
  ```