[release/5.0] (deps): Bump src/submodules/MessagePack-CSharp from `a4a14ce` to `6caf299`#6

dependabot[bot] wants to merge 1 commit intorelease/5.0pavel-petrenko/aspnetcore:release/5.0from

dependabot/submodules/release/5.0/src/submodules/MessagePack-CSharp-6caf299pavel-petrenko/aspnetcore:dependabot/submodules/release/5.0/src/submodules/MessagePack-CSharp-6caf299Copy head branch name to clipboard