Bump go version to 1.19.8
This version of go install allows git branches (with slashes) for the version string. Cf. https://git.glasklar.is/system-transparency/core/system-transparency/-/jobs/5544/
Debian bullseye-backports is carrying 1.19.8.
This version of go install allows git branches (with slashes) for the version string. Cf. https://git.glasklar.is/system-transparency/core/system-transparency/-/jobs/5544/
Debian bullseye-backports is carrying 1.19.8.