Set SameSite attribute for gtag

    Cookie “_ga” does not have a proper “SameSite” attribute value.
    Soon, cookies without the “SameSite” attribute or with an invalid
    value will be treated as “Lax”. This means that the cookie will no
    longer be sent in third-party contexts. If your application depends
    on this cookie being available in such contexts, please add the
    “SameSite=None“ attribute to it. To know more about the “SameSite“
    attribute, read https://developer.mozilla.org/docs/Web/HTTP/Headers/Set-Cookie/SameSite

Author: dtolnay

book.json

@@ -10,7 +10,8 @@
         },
         "ga4": {
             "tag": "G-T5QD1R7FZW",
-            "anonymize_ip": true
+            "anonymize_ip": true,
+            "cookie_domain": "serde.rs"
         },
         "bulk-redirect": {
             "redirectsFile": "redirects.json"