Update workflows to use node 20

.github/workflows/build-apk.yml

@@ -16,10 +16,10 @@ jobs:
     - name: checkout sources
       uses: actions/checkout@v3
 
-    - name: use Node.js 16.x
+    - name: use Node.js 20.x
       uses: actions/setup-node@v3
       with:
-        node-version: 16
+        node-version: 20
 
     - name: Set up Java
       uses: actions/setup-java@v2

.github/workflows/deploy-apk.yml

@@ -15,10 +15,10 @@ jobs:
     - name: checkout sources
       uses: actions/checkout@v3
 
-    - name: use Node.js 16.x
+    - name: use Node.js 20.x
       uses: actions/setup-node@v3
       with:
-        node-version: 16
+        node-version: 20
 
     - name: Set up Java
       uses: actions/setup-java@v2