Bump evals submodule: unify per-agent bootstrap scenarios

Points evals at superpowers-evals 70a245c, which replaces the seven
per-agent *-superpowers-bootstrap scenarios with one cross-agent
superpowers-bootstrap scenario (adds the QUORUM_CODING_AGENT env var and
the bootstrap-installed dispatcher check verb).

evals

@@ -1 +1 @@
-Subproject commit db37d5fbecc26e815bf61dd5fdc6a35e79ef1cbe
+Subproject commit 70a245c36c02587d2282591b48973db68940ada3