build: Update release version to v1.13.7

[travisn]

For the patch release update the example manifests and docs to v1.13.7

Checklist:

• Commit Message Formatting: Commit titles and messages follow guidelines in the developer guide.
• Reviewed the developer guide on Submitting a Pull Request
• Pending release notes updated with breaking and/or notable changes for the next minor release.
• Documentation has been updated, if necessary.
• Unit tests have been added, if necessary.
• Integration tests have been added, if necessary.

[mergify]

Hi @travisn, this pull request was opened against a release branch, is it expected? Normally patches should go in the master branch first and then be backported to release branches.

[BlaineEXE]

Double checking that we still want to update the helm chart manually

[travisn]

Yes for now we will update manually. I wonder if there is a better approach so we can just use the published version so we don't need to include it in the values.yaml, but we can take that up separately.