ci: refresh standards reusable pins to current HEAD (d7c2271) (#74)

Re-pin the hyperpolymath/standards reusable workflow SHAs to the current
`standards/main` HEAD `d7c22711e830e1f383846472f6e9b99debdb201e`.

This refreshes: hypatia-scan.yml governance.yml scorecard.yml

Why: consumers pin these reusables by standards commit SHA; the prior
pin predated the current HEAD (which carries the `actions/cache` v4.2.0
repair, the scanner `GITHUB_TOKEN` wiring, and the `--exit-zero`
findings-upload fix). Refreshing to HEAD clears the `scan / Hypatia
Neurosymbolic Analysis` failure and the workflow-staleness check.

Propagation of hyperpolymath/hypatia#464. Mechanical pin refresh only.

---
_Generated by [Claude Code](https://claude.ai/code)_

Author: hyperpolymath

.github/workflows/governance.yml

@@ -13,4 +13,4 @@ permissions:
 
 jobs:
   governance:
-    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@d135b05bfc647d0c0fbfedc7e80f37ea50f49236
+    uses: hyperpolymath/standards/.github/workflows/governance-reusable.yml@d7c22711e830e1f383846472f6e9b99debdb201e

.github/workflows/hypatia-scan.yml

@@ -16,4 +16,4 @@ permissions:
 
 jobs:
   scan:
-    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@d135b05bfc647d0c0fbfedc7e80f37ea50f49236
+    uses: hyperpolymath/standards/.github/workflows/hypatia-scan-reusable.yml@d7c22711e830e1f383846472f6e9b99debdb201e

.github/workflows/scorecard.yml

@@ -13,4 +13,4 @@ permissions:
 
 jobs:
   scorecard:
-    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@d135b05bfc647d0c0fbfedc7e80f37ea50f49236
+    uses: hyperpolymath/standards/.github/workflows/scorecard-reusable.yml@d7c22711e830e1f383846472f6e9b99debdb201e