Update funding link (#12425)

# Objective

- Link to the donate page of the foundation

## Solution

- Link to the donate page of the foundation

.github/FUNDING.yml

@@ -1,3 +1 @@
-# These are supported funding model platforms
-
-custom: https://bevyengine.org/community/donate/
+custom: https://bevyengine.org/donate/

README.md

@@ -96,7 +96,7 @@ This [list][cargo_features] outlines the different cargo features supported by B
 
 Bevy is the result of the hard work of many people. A huge thanks to all Bevy contributors, the many open source projects that have come before us, the [Rust gamedev ecosystem](https://arewegameyet.rs/), and the many libraries we build on.
 
-A huge thanks to Bevy's [generous sponsors](https://bevyengine.org). Bevy will always be free and open source, but it isn't free to make. Please consider [sponsoring our work](https://bevyengine.org/community/donate/) if you like what we're building.
+A huge thanks to Bevy's [generous sponsors](https://bevyengine.org). Bevy will always be free and open source, but it isn't free to make. Please consider [sponsoring our work](https://bevyengine.org/donate/) if you like what we're building.
 
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