Fix thanks.rust-lang.org trigger link

Author: Mark-Simulacrum

src/release/process.md

@@ -160,7 +160,7 @@ Decide on a time to do the release, T.
 - **T+1hr** Send a PR to the beta branch to comment out `dev: 1` again and
   update the date to download from (modifying `src/stage0.txt`).
 
-[update-thanks]: https://github.com/rust-lang/thanks/actions?query=workflow%3ACI
+[update-thanks]: https://github.com/rust-lang/thanks/actions/workflows/ci.yml
 
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