[bitnami/keycloak] improve keycloak value file comments on extraEnvVars property

[alshf89]

Description of the change
This pull request fixes a typo in the comments of the values.yaml file in the chart. The change only updates the comments and does not affect any functionality or behavior of the chart.

Benefits
Improves the readability and clarity of the comments in the values.yaml file.
Aligns the file with the intended documentation standards.

Possible drawbacks
None. This change is limited to a typo correction in the comments.

Applicable issues
None.

Additional information
This is a minor documentation update and does not require version bumping in Chart.yaml.

Checklist

• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)

[alshf89]

I'm not sure If I need to bump the chart version for it or not

[carrodher]

Thanks for your contribution! Yes, please, could you bump the chart version in the Chart.yaml? This is necessary to test the changes and cut a new release.

In the same way, this is just a friendly reminder that signing your commits is important. Your signature certifies that you either authored the patch or have the necessary rights to contribute to the changes. You can find detailed information on how to do this in the “Sign your work” section of our contributing guidelines.

Feel free to reach out if you have any questions or need assistance with the signing process.

[alshf89]

@carrodher Thanks for the reminder, I've just bumped the chart version in Chart.yaml and signed the commit. Let me know if there's anything else needed.