CI: use write-access deploy key for gh-pages push

Author: pierreablin

.circleci/config.yml

@@ -8,6 +8,9 @@ jobs:
       docker:
         - image: cimg/python:3.12-browsers
       steps:
+        - add_ssh_keys:
+            fingerprints:
+              - "SHA256:U7MtrRpGxaJO8/JkKkkU5fenqtb7tIQ8Iq4PKZj+aqQ"
         - checkout
         - run:
             name: Set BASH_ENV
@@ -63,9 +66,6 @@ jobs:
               cd ..;
 
         # Deploy docs
-        - add_ssh_keys:
-            fingerprints:
-              - "SHA256:U7MtrRpGxaJO8/JkKkkU5fenqtb7tIQ8Iq4PKZj+aqQ"
         - run:
             name: deploy
             command: |