Website does not have the correct trademark disclaimer

As part of our ongoing effort to https://github.com/cncf/techdocs/issues/198, we noticed that the website does not pass the trademark criteria on [CLOMonitor](https://clomonitor.io/search?foundation=cncf¬_passing_check=trademark_disclaimer&page=1).

To fix this:
Head to the source code of the website. In the `` section, add a **disclaimer** or **link** to the Linux foundation trademark disclaimer page:

**Disclaimer**
```

The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation,
please see our Trademark Usage page.

```

**Link**
```

• Trademarks

Start in the website source by locating the section. Add either the provided Linux Foundation trademark disclaimer or a link to the Trademark Usage page, then verify that the footer contains the required trademark reference and that the CLOMonitor trademark-disclaimer check passes.

Written by the indexing model from the issue text.