Auto merge of #141910 - Kobzol:new-bors-try-branch-name-doc, r=marcoieni

Fix `create-docs-artifacts.sh` with new bors

The slashes in the branch name (`automation/bors/try`) were causing issues for this script (https://github.com/rust-lang/rust/actions/runs/15391908130/job/43303193243).

r? `@marcoieni`

try-job: `mingw-check*`