ci: refresh stale hyperpolymath/standards workflow pins

The required `Check Workflow Staleness` governance check failed because
governance.yml and scorecard.yml pinned the standards reusable workflows to
5a93d9d, which is out of the recency window (not a recognised ancestor of
standards HEAD; the window is <=50 commits behind HEAD or <=14 days old).

Re-pin both to the current standards HEAD
e8fe153b568af5e3534a261eee0258fa84fa6c5e (the SHA the check itself reports), so
the check passes and (auto-)merge unblocks for this and future PRs. mirror.yml's
separate pin was not flagged and is left as-is; there is no scorecard-enforcer.yml
in this repo to remove.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0195yA45jSSP7YDPwJSpw4bM

Author: hyperpolymath

.github/workflows/governance.yml

@@ -13,4 +13,4 @@ permissions:
 
 jobs:
   governance:
-    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@5a93d9d57cc04de4002d6d0ecd336fc7a8698910
+    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@e8fe153b568af5e3534a261eee0258fa84fa6c5e

.github/workflows/scorecard.yml

@@ -13,4 +13,4 @@ permissions:
 
 jobs:
   scorecard:
-    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@5a93d9d57cc04de4002d6d0ecd336fc7a8698910
+    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@e8fe153b568af5e3534a261eee0258fa84fa6c5e