Add requirements.yaml to Charts file structure

docs/charts.md

@@ -25,6 +25,7 @@ wordpress/
   Chart.yaml          # A YAML file containing information about the chart
   LICENSE             # OPTIONAL: A plain text file containing the license for the chart
   README.md           # OPTIONAL: A human-readable README file
+  requirements.yaml   # OPTIONAL: A YAML file listing dependencies for the chart
   values.yaml         # The default configuration values for this chart
   charts/             # OPTIONAL: A directory containing any charts upon which this chart depends.
   templates/          # OPTIONAL: A directory of templates that, when combined with values,