devel/librashader: update to 0.6.2
Changes:
https://github.com/SnowflakePowered/librashader/releases/tag/librashader-v0.6.1
https://github.com/SnowflakePowered/librashader/releases/tag/librashader-v0.6.2
Version 0.6.0 was skipped due to a release configuration error.
PR: 282874