fix: avoid pr hash collisions

[Aslemammad]

the hash function of ohash has a short length and hitting hash collisions was kinda inevitable!

so let's use proper keys from now on, for PRs, since they're long living, compared to workflow_run keys.

this would hopefully fix the element-plus issue we have.

[continuous-releases-staging]

Open in Stackblitz • example-1 • example-2

npm i https://9749d680.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/pkg-pr-new@308

npm i https://9749d680.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/playground-a@308

npm i https://9749d680.stackblitz-cr.pages.dev/stackblitz-labs/pkg.pr.new/playground-b@308

commit: b9ecff1