ci(governance): bump standards reusable pins to 5a93d9d5 (completes refresh)

Follow-up to the scorecard-enforcer deletion in 9d840c5: the governance.yml and
scorecard.yml pin bumps were left unstaged in that commit, so they did not land.
Bump both standards-reusable pins from @main / @e0caf115 to the current standards
SHA @5a93d9d5, completing the workflow-staleness refresh.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LvsZgNxFbeqfRmrVFNhJ8G

Author: claude

.github/workflows/governance.yml

@@ -31,4 +31,4 @@ permissions:
 
 jobs:
   governance:
-    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@main
+    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@5a93d9d57cc04de4002d6d0ecd336fc7a8698910

.github/workflows/scorecard.yml

@@ -12,5 +12,5 @@ permissions: read-all
 
 jobs:
   analysis:
-    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@e0caf11508a3989574713c78f5f444f2ce5e33ef
+    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@5a93d9d57cc04de4002d6d0ecd336fc7a8698910
     secrets: inherit