fix: bump datum-cloud/actions refs to v1.13.1 (#180)

Fixes the `Post Setup Node.js` cache failure introduced in #160.

`bump-npm-version.yaml` never runs `pnpm install`, so `setup-node` with
`cache: pnpm` failed at teardown because the cache directory didn't
exist. datum-cloud/actions#60 removed the pnpm cache from that workflow
and was released as `v1.13.1`.

## Test plan
- [ ] Trigger `workflow_dispatch` on this branch → `Post Setup Node.js`
no longer fails

Author: kevwilliams

.github/workflows/publish-ui-npm.yaml

@@ -19,7 +19,7 @@ jobs:
   publish-dev:
     name: Publish dev build
     if: github.event_name == 'push'
-    uses: datum-cloud/actions/.github/workflows/publish-npm-package.yaml@v1.13.0
+    uses: datum-cloud/actions/.github/workflows/publish-npm-package.yaml@v1.13.1
     with:
       package-name: "@datum-cloud/activity-ui"
       package-path: ui
@@ -35,7 +35,7 @@ jobs:
     if: github.event_name == 'workflow_dispatch'
     permissions:
       contents: write
-    uses: datum-cloud/actions/.github/workflows/bump-npm-version.yaml@v1.13.0
+    uses: datum-cloud/actions/.github/workflows/bump-npm-version.yaml@v1.13.1
     with:
       package-path: ui
       package-name: "@datum-cloud/activity-ui"
@@ -46,7 +46,7 @@ jobs:
   publish-release:
     name: Publish release
     needs: bump-version
-    uses: datum-cloud/actions/.github/workflows/publish-npm-package.yaml@v1.13.0
+    uses: datum-cloud/actions/.github/workflows/publish-npm-package.yaml@v1.13.1
     with:
       package-name: "@datum-cloud/activity-ui"
       package-path: ui