Rollup merge of #115446 - klensy:fixup-stable-version, r=cuviper

fix version for abi_thiscall to 1.73.0, which was forgotten to change when stabilized and (later) moved to beta

See:

rust-lang/rust#114562 (comment)
rust-lang/rust#115056 (comment)
https://rust-lang.zulipchat.com/#narrow/stream/241545-t-release/topic/1.2E72.2E0/near/387695644

Should be backported to beta too.