doc: enable publishing docs for tag v0.9.0

Currently, the Rust Driver documentation shows
the docs for the branch "main".
This commit enables publishing the docs for
the latest Rust Driver version and sets it
as the latet STABLE version.

docs/source/conf.py

@@ -14,12 +14,12 @@
 # -- General configuration ------------------------------------------------
 
 # Build documentation for the following tags and branches
-TAGS = []
-BRANCHES = ['main']
+TAGS = ['v0.9.0']
+BRANCHES = ['main', 'v0.9.0']
 # Set the latest version.
-LATEST_VERSION = 'main'
+LATEST_VERSION = 'v0.9.0'
 # Set which versions are not released yet.
-UNSTABLE_VERSIONS = []
+UNSTABLE_VERSIONS = ['v0.9.0']
 # Set which versions are deprecated
 DEPRECATED_VERSIONS = []