Fix cmake cache for CI

.github/workflows/ci.yml

@@ -51,7 +51,9 @@ jobs:
       - name: CMake Cache
         uses: actions/cache@v3
         with:
-          path: app/.cxx
+          path: |
+            app/.cxx
+            app/src/main/cpp/nettle/nettle
           key: ${{ runner.os }}-cmake-${{ github.run_id }}
           restore-keys: ${{ runner.os }}-cmake-
 

.github/workflows/releases.yml

@@ -32,7 +32,9 @@ jobs:
       - name: CMake Cache
         uses: actions/cache@v3
         with:
-          path: app/.cxx
+          path: |
+            app/.cxx
+            app/src/main/cpp/nettle/nettle
           key: ${{ runner.os }}-cmake-${{ github.run_id }}
           restore-keys: ${{ runner.os }}-cmake-