docs: improvements to the contributing guide

Signed-off-by: Lester Guerzon <[email protected]>

CONTRIBUTING.md

@@ -8,15 +8,13 @@
 
 ### Technical Requirements
 
-When submitting a PR make sure that it:
+When submitting a pull request, please ensure that:
 
 - The PR follow [Helm best practices](https://helm.sh/docs/chart_best_practices/).
-
 - Any change to a chart requires a version bump following [semver](https://semver.org/) principles.
-
 - The tables of parameters are generated based on the metadata information from the `values.yaml` file, by using [this tool](https://github.com/bitnami-labs/readme-generator-for-helm).
 
-  The easiest way to do this is to run the tool via Docker:
+  A quick way to do this is to run the tool via Docker:
 
   ```bash
   # Clone and build:
@@ -28,4 +26,8 @@ When submitting a PR make sure that it:
   cd <this-project-dir>
   docker run --rm -d -it --name readmegen -v $(pwd):/mnt readme-gen bash
   docker exec -it readmegen bash
+
+  # Update the values documentation
+  cd /mnt
+  readme-generator -v values.yaml -r README.md
   ```