Merge pull request #231 from marcfehling/dependencies

gh-actions: Update actions/checkout. Also build on dealii 9.7.1 image.

Author: marcfehling

.github/workflows/linux.yml

@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         build_type: ["Debug"]
-        dealii_version: ["master", "v9.6.0", "v9.5.0"]
+        dealii_version: ["master", "v9.7.1", "v9.6.0", "v9.5.0"]
         ubuntu_version: ["jammy"]
         include:
           - build_type: "Debug"
@@ -54,7 +54,7 @@ jobs:
           make
           echo "BRAID_DIR=${PWD}" >> $GITHUB_ENV
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Compile all projects
         run: |