Redirect policies/trademark to logos and usage page (#1588)

This redirect restores an old link from trademark policies to our logos
and usages page.

The logos and usage policies page pretty much have contents from the
trademark page that moved back in 2022/2023.

As the previous link is still around, this redirect should function
better than a 404.

## References

Supersedes #1587

Author: leobalter

content/policies/logos-and-usage.mdx

@@ -1,6 +1,8 @@
 ---
 title: npm Logos and Usage
 edit_on_github: false
+redirect_from:
+  - /policies/trademark/
 ---
 
 This policy describes npm logos and trademarks and how you may use them. For information on what to do if someone infringes a trademark of _yours_ with a confusing package name, see the [Disputes policy][disputes].