Only use one Python version in scrapy-unreleased.

Author: wRAR

.github/workflows/scrapy-unreleased.yml

@@ -14,21 +14,17 @@ jobs:
     if: contains(github.event.pull_request.labels.*.name, 'test-scrapy-unreleased')
     runs-on: ubuntu-22.04
     timeout-minutes: 20
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v6
 
-    - name: Set up Python ${{ matrix.python-version }}
+    - name: Set up Python
       uses: actions/setup-python@v6
       with:
-        python-version: ${{ matrix.python-version }}
+        python-version: 3.13
 
     - name: Set up node
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: 18