DOCSP-49529: Add patch number to fix API link (#263)

(cherry picked from commit ce65600)

Author: mcmorisi

snooty.toml

@@ -31,7 +31,7 @@ mongo-community = "MongoDB Community Edition"
 mongo-enterprise = "MongoDB Enterprise Edition"
 docs-branch = "master"                                                       # always set this to the docs branch (i.e. master, 1.7, 1.8, etc.)
 version-number = "4.12"
-patch-version-number = "{+version-number+}"                                # always set this to the driver branch (i.e. 1.7.0, 1.8.0, etc.)
+patch-version-number = "{+version-number+}.0"                                # always set this to the driver branch (i.e. 1.7.0, 1.8.0, etc.)
 version = "v{+version-number+}"
 stable-api = "Stable API"
 api-root = "https://pymongo.readthedocs.io/en/{+patch-version-number+}/api/"