chore: downgrade to jobserver@0.1.28

See rust-lang/jobserver-rs#99

While there is a fix waiting for review,
we might miss the release window for 1.80,
so propose we beta-backport this

Author: weihanglo

Cargo.lock

@@ -58,7 +58,7 @@ ignore = "0.4.22"
 im-rc = "15.1.0"
 indexmap = "2.2.6"
 itertools = "0.12.1"
-jobserver = "0.1.31"
+jobserver = "0.1.28"
 lazycell = "1.3.0"
 libc = "0.2.154"
 libgit2-sys = "0.16.2"