blacksmith.sh: Migrate workflows to Blacksmith (#149)

Migrate workflows to Blacksmith

Co-authored-by: blacksmith-sh[bot] <157653362+blacksmith-sh[bot]@users.noreply.github.com>

.github/workflows/run-tests.yml

@@ -27,15 +27,15 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     strategy:
       fail-fast: false
       matrix:
         python-version: ["3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: useblacksmith/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
     - name: Create a virtual environment
@@ -57,7 +57,7 @@ jobs:
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
   integration:
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2204
     strategy:
       fail-fast: false
       matrix:
@@ -76,7 +76,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.9
-      uses: actions/setup-python@v5
+      uses: useblacksmith/setup-python@v6
       with:
         python-version: 3.9
     - name: Create a virtual environment