Added: Add Clouflare funders logo

- https://www.cloudflare.com
- https://packages-cf.termux.dev

Clouflare has served around 36TB (32TB cached) data, 39M requests, 1M unique visitors in last 30 days for our https://termux.dev domain, and has potentially served 100s to 1000s of TBs of data over the years for free for Termux, primarily from the https://packages-cf.termux.dev `apt` packages repo, which is a cloudflare backed variant of our primary repo https://packages.termux.dev.

The `cloudflare.png` logo is sourced from www.cloudflare.com/press-kit

README.md

@@ -284,3 +284,7 @@ Commit messages **must** use the [Conventional Commits](https://www.conventional
 [<img alt="NLnet NGI Mobifree" width="25%" src="site/assets/sponsors/nlnet-ngi-mobifree.png" />](https://nlnet.nl/mobifree)  
 *[NLnet NGI Mobifree](https://nlnet.nl/mobifree) ([1](https://nlnet.nl/news/2024/20241111-NGI-Mobifree-grants.html), [2](https://termux.dev/en/posts/general/2024/11/11/termux-selected-for-nlnet-ngi-mobifree-grant.html))*
 
+&nbsp;
+
+[<img alt="Cloudflare" width="25%" src="site/assets/sponsors/cloudflare.png" />](https://www.cloudflare.com)  
+*[Cloudflare](https://www.cloudflare.com) ([1](https://packages-cf.termux.dev))*