chore(validate-plugins,scan-plugins): re-pin to community 426e469f

Aligns all three shared community action pins on the same SHA (426e469f). The
validate-plugins/scan-plugins actions are unchanged between d207465 and 426e469f
(only bump-plugin-shas changed in #266/#267) — SHA-consistency, no behavior change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/scan-plugins.yml

@@ -196,7 +196,7 @@ jobs:
         continue-on-error: true
         # Pinned to claude-plugins-community#34 (WIF input support).
         # TODO: re-pin to a main-branch SHA once #34 merges.
-        uses: anthropics/claude-plugins-community/.github/actions/scan-plugins@d207465eb6ec02b6f3f1dbb131717830dc9ecc68
+        uses: anthropics/claude-plugins-community/.github/actions/scan-plugins@426e469f322952061102b286b378c0c9733a0934
         with:
           # Anthropic auth via Workload Identity Federation — the action
           # mints a GitHub OIDC token (id-token: write above) and the claude

.github/workflows/validate-plugins.yml

@@ -38,7 +38,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: anthropics/claude-plugins-community/.github/actions/validate-plugins@d207465eb6ec02b6f3f1dbb131717830dc9ecc68
+      - uses: anthropics/claude-plugins-community/.github/actions/validate-plugins@426e469f322952061102b286b378c0c9733a0934
         with:
           marketplace-path: .claude-plugin/marketplace.json
           # Official curated marketplace: SHA-pin (I5) is a HARD error.