Update rustdoc-pages.yml (#16)

Should fix the build

Author: LegNeato

.github/workflows/rustdoc-pages.yml

@@ -40,7 +40,7 @@ jobs:
       id: pages
       uses: actions/configure-pages@v2
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@v1
+      uses: actions/upload-pages-artifact@v3
       with:
         # Upload entire doc folder
         path: './target/doc'