chore(AIP-4221): change example retry policy values (#1519)

Author: wora

aip/client-libraries/4221.md

@@ -86,9 +86,9 @@ service, except for those that are explicitly named which get no `RetryPolicy`.
     "timeout": "60s",
     "retryPolicy": {
       "maxAttempts": 3,
-      "initialBackoff": "0.01s",
-      "maxBackoff": "60s",
-      "backoffMultiplier": 1.3,
+      "initialBackoff": "1s",
+      "maxBackoff": "10s",
+      "backoffMultiplier": 2,
       "retryableStatusCodes": ["UNAVAILABLE"]
     }
   },
@@ -102,7 +102,7 @@ service, except for those that are explicitly named which get no `RetryPolicy`.
       { "service": "google.example.library.v1.LibraryService", "method": "MoveBook" }
     ],
     "waitForReady": true,
-    "timeout": "60s"
+    "timeout": "10s"
   }]
 }
 ```