gitlab-ci.yml: allow conda docs stage to accept releaseinfo changes when running apt-get update

.gitlab-ci.yml

@@ -502,7 +502,7 @@ docs:
   before_script: [ ]
   script:
     - |
-      apt-get update -y
+      apt-get --allow-releaseinfo-change update -y
       apt-get install -y dvipng texlive-latex-base texlive-latex-extra
       conda init bash
       source ~/.bashrc