ci: avoid bun setup API flake in node checks

.github/actions/setup-node-env/action.yml

@@ -52,7 +52,7 @@ runs:
       if: inputs.install-bun == 'true'
       uses: oven-sh/setup-bun@v2
       with:
-        bun-version: "1.3.9"
+        bun-version: "1.3.9+cf6cdbbba"
 
     - name: Runtime versions
       shell: bash

.github/workflows/ci.yml

@@ -199,6 +199,8 @@ jobs:
 
       - name: Setup Node environment
         uses: ./.github/actions/setup-node-env
+        with:
+          install-bun: "${{ matrix.runtime == 'bun' }}"
 
       - name: Configure vitest JSON reports
         if: matrix.task == 'test' && matrix.runtime == 'node'