fix double nesting

Author: th-skam

.github/workflows/ci.yml

@@ -41,11 +41,8 @@ jobs:
             ..
           ninja install
           # Flatten the CollisionAlgorithm install structure
-          INCLUDE_DIR="$GITHUB_WORKSPACE/install/CollisionAlgorithm/include/CollisionAlgorithm"
-          if [ -d "$INCLUDE_DIR/CollisionAlgorithm" ]; then
-            rsync -a "$INCLUDE_DIR/CollisionAlgorithm/" "$INCLUDE_DIR/"
-            rm -rf "$INCLUDE_DIR/CollisionAlgorithm"
-          fi
+          rsync -a $GITHUB_WORKSPACE/install/CollisionAlgorithm/include/include/CollisionAlgorithm/ \
+          $GITHUB_WORKSPACE/install/CollisionAlgorithm/include/CollisionAlgorithm/
           ls -R $GITHUB_WORKSPACE/install/CollisionAlgorithm/include
           
       - name: Checkout source code