Looks like a problem at https://julialang-s3.julialang.org.
curl exit status 35 means SSL error.
There’s an error message at the bottom (due to Stderr output is shown after the build log rather than inline):
curl: (35) schannel: next InitializeSecurityContext failed: Unknown error (0x80092013) - The revocation function was unable to check revocation because the revocation server was offline.
I can download this file fine, so they must have resolved the problem by now. Try restarting the affected jobs/builds.