v0.64.1

This is a bug fix release addressing the following issues:

• ci: Pin GitHub Actions macos runner version. The architecture of the GitHub Actions Runner macos-latest was changed from amd64 to arm64 and as a result darwin/amd64 binary wasn't released (#6720) authored by @suzuki-shunsuke
• plugins/discovery: Update comparison logic used in the discovery plugin for handling overrides. This fixes a panic that resulted from the comparison of uncomparable types (#6723) authored by @ashutosh-narkar