fix(ci): use the workspace pnpm version

Remove duplicate action-level pnpm pins so CI derives its version from
repository packageManager metadata and cannot drift from local builds.

Author: iamjr15

.github/actions/setup-repository/action.yml

@@ -17,8 +17,6 @@ runs:
         RELEASE_SHA: ${{ inputs.release-sha }}
       run: test "$(git rev-parse HEAD)" = "$RELEASE_SHA"
     - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
-      with:
-        version: 11.8.0
     - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
       with:
         node-version: 22.22.2

.github/workflows/static-checks.yml

@@ -21,8 +21,6 @@ jobs:
         with:
           fetch-depth: 0
       - uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9
-        with:
-          version: 11.8.0
       - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6.5.0
         with:
           node-version: 22.22.2