Add missing TOC entries for Byte_Pool_Services in ThreadX chapter 4

[StoneBam]

This PR adds the missing table of contents entries for the Byte_Pool_Services in chapter 4 of the ThreadX documentation.

[ayedm1]

Hi @StoneBam,

In order to be able to contribute to Eclipse Foundation projects you must electronically sign the Eclipse Contributor Agreement (ECA). The purpose of the ECA is to provide a written record that you have agreed to provide your code and documentation contributions under the licenses used by the Eclipse ThreadX project. It also makes it clear that you are promising that what you are contributing to Eclipse is code you wrote, and you have the necessary rights to contribute it to our projects. And finally, it documents a commitment from you that your open source contributions will be permanently on the public record.

Signing the ECA requires an Eclipse Foundation account if you do not already have one. You can create one for free at https://accounts.eclipse.org/.

Be sure to use the same email address when you register for the account that you intend to use on Git commit records.

[StoneBam]

Hi @ayedm1,

For privacy reasons, I use the StoneBam@users.noreply.github.com email for most of my commits. But with this, I can't create an account. How do we proceed in this case?
Make a new PR with an email I will use to create the account?

[eclipse-threadx-bot]

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