🦉 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

@@ -54,7 +54,6 @@
     ],
     "3.8": [
         "bqstorage",
-        "spanner_graphs",
     ],
     "3.9": [
         "bqstorage",
@@ -67,7 +66,9 @@
         "geopandas",
     ],
     "3.11": [],
-    "3.12": [],
+    "3.12": [
+        "['bqstorage', 'spanner_graphs']",
+    ],
     "3.13": [
         "bqstorage",
         "bigframes",
@@ -91,7 +92,6 @@
     ],
     "3.8": [
         "bqstorage",
-        "spanner_graphs",
     ],
     "3.9": [
         "bqstorage",
@@ -104,7 +104,9 @@
         "geopandas",
     ],
     "3.11": [],
-    "3.12": [],
+    "3.12": [
+        "['bqstorage', 'spanner_graphs']",
+    ],
     "3.13": [
         "bqstorage",
         "bigframes",