add linux libraries for ss3 to update-pkgdown.yml

.github/workflows/update-pkgdown.yml

@@ -13,6 +13,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: update linux packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libcurl4-openssl-dev
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+          sudo apt-get install --only-upgrade libstdc++6
+
       - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v2