fix(OTEL): edits to OTEL intro doc

[ally-sassman]

This PR covers an extensive review of the OTEL docs:

• The user flow from page to page makes sense and is intuitive
• The left nav naming system makes sense and is consistent
• No broken links
• All screenshots and images are up to date

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[github-actions[bot]]

[!WARNING] ruby-agent-configuration.mdx is an autogenerated file.

To change the Ruby agent configuration file, please submit an issue or open a PR in the newrelic/newrelic-ruby-agent repo.

[github-actions[bot]]

[!WARNING] ruby-agent-configuration.mdx is an autogenerated file.

To change the Ruby agent configuration file, please submit an issue or open a PR in the newrelic/newrelic-ruby-agent repo.

[github-actions[bot]]

[!WARNING] ruby-agent-configuration.mdx is an autogenerated file.

To change the Ruby agent configuration file, please submit an issue or open a PR in the newrelic/newrelic-ruby-agent repo.

[github-actions[bot]]

[!WARNING] ruby-agent-configuration.mdx is an autogenerated file.

To change the Ruby agent configuration file, please submit an issue or open a PR in the newrelic/newrelic-ruby-agent repo.

[github-actions[bot]]

[!WARNING] ruby-agent-configuration.mdx is an autogenerated file.

To change the Ruby agent configuration file, please submit an issue or open a PR in the newrelic/newrelic-ruby-agent repo.