Update upload artfacts in github workflow to v4

Author: liamjberrisford

.github/workflows/build-book.yml

@@ -24,7 +24,7 @@ jobs:
 
     # (optional) Cache your executed notebooks between runs
     - name: Cache executed notebooks
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: _build/.jupyter_cache
         key: jupyter-book-cache-${{ hashFiles('requirements.txt') }}
@@ -36,7 +36,7 @@ jobs:
 
     # Always upload logs, even if build succeeds
     - name: Upload error logs
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: error-logs
         path: _build/html/reports/pathways/related_courses.err.log