Auto merge of #70568 - Dylan-DPC:rollup-em6vnpx, r=Dylan-DPC

Rollup of 4 pull requests

Successful merges:

 - #70479 (avoid creating unnecessary reference in Windows Env iterator)
 - #70546 (Polonius: update to 0.12.1, fix more move errors false positives, update test expectations)
 - #70559 (fix BTreeMap test compilation with Miri)
 - #70567 (Fix broken link in README)

Failed merges:

r? @ghost