ci: pin scan-plugins + bump-plugin-shas to self-healing action too

Extend the validate-plugins pin bump (this PR) to the other two shared actions
that install the claude CLI the same flaky way. All three now pin the same
claude-plugins-community SHA (d207465) carrying the self-healing install
(community#233 + #234): force the optional native dep, verify, re-run postinstall
on a miss, timeout every network step, retry with real reinstalls.

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

.github/workflows/bump-plugin-shas.yml

@@ -51,7 +51,7 @@ jobs:
 
       # createCommitOnBranch-based bump so commits are signed by GitHub and
       # satisfy the org-level required_signatures ruleset on main.
-      - uses: anthropics/claude-plugins-community/.github/actions/bump-plugin-shas@e2019b2a01f11aa1484c53540b1cfab5eebbc299
+      - uses: anthropics/claude-plugins-community/.github/actions/bump-plugin-shas@d207465eb6ec02b6f3f1dbb131717830dc9ecc68
         id: bump
         with:
           marketplace-path: .claude-plugin/marketplace.json

.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@e85f0d65b4fc87f07862e1dcdc467950514414ec
+        uses: anthropics/claude-plugins-community/.github/actions/scan-plugins@d207465eb6ec02b6f3f1dbb131717830dc9ecc68
         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

@@ -32,7 +32,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: anthropics/claude-plugins-community/.github/actions/validate-plugins@5d75f9912fedf8609e56fa7c7f9d717581c98a3d
+      - uses: anthropics/claude-plugins-community/.github/actions/validate-plugins@d207465eb6ec02b6f3f1dbb131717830dc9ecc68
         with:
           marketplace-path: .claude-plugin/marketplace.json
           # Official curated marketplace: SHA-pin (I5) is a HARD error.