Add step to upload Javadocs artifact (needed by deploy action) and update cache path

Author: SableRaf

.github/workflows/build-and-deploy-javadoc.yml

@@ -95,6 +95,12 @@ jobs:
         restore-keys: |
           javadocs-
 
+    - name: Upload Javadocs artifact
+      uses: actions/upload-pages-artifact@v3
+      with:
+        name: github-pages
+        path: processing4/build/javadoc
+
     - name: Clean up the processing4 directory
       run: |
         rm -rf processing4/
@@ -132,7 +138,7 @@ jobs:
       - name: Restore Javadocs from cache
         uses: actions/cache@v4
         with:
-          path: processing4/build/javadoc
+          path: doc
           key: javadocs-${{ env.COMMIT_SHA }}
           restore-keys: |
             javadocs-