Merge pull request #7263 from shourysingh07/issue_510

Fixed the broken link on p5.js website page for "WebGL Contribution Guide".

Author: Qianqianye

contributor_docs/webgl_contribution_guide.md

@@ -16,7 +16,7 @@ If you're reading this page, you're probably interested in helping work on WebGL
 
 ## Planning
 
-We organize open issues [in a GitHub Project](https://github.com/orgs/processing/projects/5), where we divide them up into a few types:
+We organize open issues [in a GitHub Project](https://github.com/orgs/processing/projects/20), where we divide them up into a few types:
 
 - **System-level changes** are longer-term goals with far-reaching implications in the code. These require the most discussion and planning before jumping into implementation.
 - **Bugs with no solution yet** are bug reports that need some debugging to narrow down the cause. These are not yet ready to be fixed: once the cause is found, then we can discuss the best way to fix it.