Update actions/checkout digest to de0fac2 (#102)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/test-notebooks.yml

@@ -19,7 +19,7 @@ jobs:
     name: Notebooks
 
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       with:
         submodules: "recursive"
     - name: Create Python Environment

.github/workflows/test-projects.yml

@@ -19,7 +19,7 @@ jobs:
     name: Projects
 
     steps:
-    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       with:
         submodules: "recursive"
     - name: Create Python Environment