Fix typo (#709)

Signed-off-by: Pascal Hofmann <[email protected]>

site/content/kapp-controller/docs/develop/kctrl-package-authoring.md

@@ -194,7 +194,7 @@ The configuration for the same can be found in the `config` directory. The inter
 
 ![Package Init for Simple App](/images/kctrl/pkg-init-simple-app.png)
 
-This command generates `package-build.yml` and `package-reources.yml` files that tell `kctrl` how it should put the package together!
+This command generates `package-build.yml` and `package-resources.yml` files that tell `kctrl` how it should put the package together!
 
 ### Releasing the package