chore(deps): update github artifact actions

Author: renovate[bot]

.github/workflows/build-and-test.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Build installer
         run: pixi run build-installer
       - name: Upload installer
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: installer-${{ matrix.target_arch }}
           path: DIRACOS-*.sh
@@ -52,7 +52,7 @@ jobs:
         target_arch: ["linux-64"]
     steps:
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-${{ matrix.target_arch }}
       - name: Generate environment.yaml
@@ -61,7 +61,7 @@ jobs:
           source diracos/diracosrc
           conda env export --file environment.yaml --prefix $DIRACOS
       - name: Upload environment.yaml
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: environment-yaml-${{ matrix.target_arch }}
           path: |
@@ -79,7 +79,7 @@ jobs:
           cache: true
           environments: release
       - name: Download artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: artifacts
       - name: Create release notes
@@ -90,7 +90,7 @@ jobs:
             > release-notes.md
           cat release-notes.md
       - name: Upload release-notes.md
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: release-notes
           path: |
@@ -123,7 +123,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: ${{ matrix.installer }}
       - name: Run tests
@@ -141,7 +141,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-osx-64
       - name: Run tests
@@ -163,7 +163,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-osx-arm64
       - name: Run tests
@@ -190,7 +190,7 @@ jobs:
         with:
           python-version: '3.14'
       - name: Download installer
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: installer-linux-64
       - name: Prepare environment