docs(python): update intersphinx for grpc and auth

docs/conf.py

@@ -345,10 +345,10 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "python": ("http://python.readthedocs.org/en/latest/", None),
-    "google-auth": ("https://google-auth.readthedocs.io/en/stable", None),
+    "python": ("https://python.readthedocs.org/en/latest/", None),
+    "google-auth": ("https://googleapis.dev/python/google-auth/latest/", None),
     "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None,),
-    "grpc": ("https://grpc.io/grpc/python/", None),
+    "grpc": ("https://grpc.github.io/grpc/python/", None),
     "proto-plus": ("https://proto-plus-python.readthedocs.io/en/latest/", None),
 }
 

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-bigquery-connection.git",
-        "sha": "ae9541725aa6669dfa22cc7c4c9310dbe2a2764d"
+        "sha": "6e85354f33041ba8612207f7bac4e2313d982e8c"
       }
     },
     {
@@ -19,14 +19,14 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "6542bd723403513626f61642fc02ddca528409aa"
+        "sha": "9a7d9fbb7045c34c9d3d22c1ff766eeae51f04c9"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "6542bd723403513626f61642fc02ddca528409aa"
+        "sha": "9a7d9fbb7045c34c9d3d22c1ff766eeae51f04c9"
       }
     }
   ],