DOCSP-30854: Java docs - EOL v4.3 (#421)

* DOCSP-30854: Java docs - EOL v4.3

Author: Chris Cho

snooty.toml

@@ -10,6 +10,8 @@ toc_landing_pages = [
 ]
 sharedinclude_root = "https://raw.githubusercontent.com/10gen/docs-shared/main/"
 
+eol = true
+
 [constants]
 version = 4.3
 full-version = "{+version+}.4"
@@ -18,3 +20,10 @@ mdb-server = "MongoDB Server"
 package-name-org = "mongodb-org"
 api = "https://mongodb.github.io/mongo-java-driver/{+version+}"
 stable-api = "Stable API"
+
+[[banners]]
+targets = ["*"]
+variant = "info"
+value = """\
+    This version of the documentation is archived and no longer supported. View the `current documentation <https://www.mongodb.com/docs/drivers/java/sync/current/>`__ to learn how to `upgrade your version of the Java Sync Driver <https://www.mongodb.com/docs/drivers/java/sync/current/upgrade/>`__.\
+    """