fix(deps): update dependency gremlinpython to v3.8.1

Author: renovate[bot]

docs/pyproject.toml

@@ -9,7 +9,7 @@ requires-python = ">=3.13,<3.14"
 dependencies = [
   "eventlet>=0.40.3,<1.0.0",
   "gevent>=25.9.1,<26.0.0",
-  "gremlinpython==3.7.4",
+  "gremlinpython==3.8.1",
   "pygments>=2.19.2,<3.0.0",
   "myst-parser>=5.0.0",
   "redirects_cli~=0.1.3",