Update docs to meet vale linter standards

[kaylareopelle]

The newrelic/docs-website repo is starting to incorporate their vale linter into the CI. Even though the linter action is not blocking for a PR, I think we should be proactive and take care of any existing issues so the Ruby docs meet the standard.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-177313