🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

noxfile.py

@@ -68,7 +68,7 @@
     "3.11": [],
     "3.12": [
         "bqstorage",
-        "spanner_graphs",
+        "spanner-graph-notebook",
     ],
     "3.13": [
         "bqstorage",
@@ -107,7 +107,7 @@
     "3.11": [],
     "3.12": [
         "bqstorage",
-        "spanner_graphs",
+        "spanner-graph-notebook",
     ],
     "3.13": [
         "bqstorage",