fix(docs[conf]): Fix isort order — gp_sphinx (third-party) before libtmux (first-party)

Author: tony

docs/conf.py

@@ -5,10 +5,10 @@
 import pathlib
 import sys
 
-import libtmux
-
 from gp_sphinx.config import make_linkcode_resolve, merge_sphinx_config
 
+import libtmux
+
 # Get the project root dir, which is the parent dir of this
 cwd = pathlib.Path(__file__).parent
 project_root = cwd.parent