docs(ci): add sudo to apt commands

Add sudo to apt-get just in case a permission error could occur in the GitLab pipeline.

Author: walpox

docs/content/documentation/deployment/gitlab-pages.md

@@ -69,8 +69,8 @@ pages:
   stage: deploy
   script:
     - |
-      apt-get update
-      DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes --no-install-recommends wget ca-certificates
+      sudo apt-get update
+      DEBIAN_FRONTEND=noninteractive sudo apt-get install --assume-yes --no-install-recommends wget ca-certificates
       zola_url="https://github.com/getzola/zola/releases/download/v${ZOLA_VERSION}/zola-v${ZOLA_VERSION}-x86_64-unknown-linux-gnu.tar.gz"
       if ! wget --quiet --spider $zola_url; then
         echo "A Zola release with the specified version could not be found."