Bump Version 0.12.4

Author: sanger640

doc/source/conf.py

@@ -171,7 +171,7 @@ def _stop_fluent_container(gallery_conf, fname):
         },
     ],
     "switcher": {
-        "json_url": f"{cname}/release/versions.json",
+        "json_url": f"https://{cname}/release/versions.json",
         "version_match": get_version_match(__version__),
     },
     "navbar_end": ["version-switcher", "theme-switcher", "navbar-icon-links"],