Use golang-1.20 Docker image
requested to merge 62-backwards_compat-gitaly-git-job-failing-go-mod-file-indicates-go-1-20-but-maximum-version into master
Use Golang 1.20 as minimum required version (gitaly!6056 - merged) raised the minimum version of go to 1.20 so I changed the Go Docker image to be 1.20 in response.
Closes #62 (closed)
Edited by Ash McKenzie