v0.13.1

Changelog

• 60639f1: agentos: wire bashy curl + git-scm (real-git + curl toolchains) (@qiangli)
• 4335927: agentos: wire bashy git-scm (real git toolchain for act_runner's host executor) (@qiangli)
• 32b3f6f: bashy git -> the real git (git-scm); pure-Go client stays as outpost git (bootstrap) (@qiangli)