Install cmake<4 in github workflow (#480)

Some github runners embed now a cmake>=4.0 which is not yet compatible
with the cmake files. So we freeze it to the previous version (3.31.6)
thanks to a dedicated github action.

See the issue and the workaround here: actions/runner-images#11926 (comment)

Author: nhuet

.github/workflows/ci.yml

@@ -170,6 +170,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Setup cmake
+        uses: jwlawson/actions-setup-cmake@v2
+        with:
+          cmake-version: '3.31.6'
+
       - name: Load cached venv
         id: cached-pip-wheels
         uses: actions/cache@v4
@@ -262,6 +267,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Setup cmake
+        uses: jwlawson/actions-setup-cmake@v2
+        with:
+          cmake-version: '3.31.6'
+
       - name: Load cached venv
         id: cached-pip-wheels
         uses: actions/cache@v4
@@ -410,6 +420,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Setup cmake
+        uses: jwlawson/actions-setup-cmake@v2
+        with:
+          cmake-version: '3.31.6'
+
       - name: Load cached venv
         id: cached-pip-wheels
         uses: actions/cache@v4