Bump actions/upload-pages-artifact from 1 to 2 (#226)

Author: dependabot[bot]

.github/workflows/Docs.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Generate Docs
         run: ./gradlew dokkaHtmlMultiModule
       - name: Upload Docs
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v2
         with:
           path: build/dokka/htmlMultiModule
       - name: Deploy to GitHub Pages