luajit2: update to v2.1-20260701 - #29949

Checking PR #29949: luajit2: update to v2.1-20260701 (Formalities Audit)

✅ Pull request originates from a dedicated feature branch (luajit2)

Commit 28f1a1e - luajit2: update to v2.1-20260701:

✅ Author and committer identities are valid
✅ Commit is not a merge commit
✅ Commit subject layout and length are valid: "luajit2: update to v2.1-20260701"
✅ Commit description lines adhere to width formatting rules
✅ Commit contains a valid 'Signed-off-by:' line matching author or committer
⚠️ Warning: Commit is unsigned or cryptographic signature verification failed (Reason: unsigned). Signing commits is a recommended best practice for verifying identity, but is not mandatory.