fix(deps): use google-gax v3.5.2 (#1732)

* fix(deps): use google-gax v3.5.2

* fix: add comma

Author: alexander-fenster

handwritten/spanner/package.json

@@ -64,7 +64,7 @@
     "events-intercept": "^2.0.0",
     "extend": "^3.0.2",
     "google-auth-library": "^8.0.2",
-    "google-gax": "^3.3.0",
+    "google-gax": "^3.5.2",
     "grpc-gcp": "^1.0.0",
     "is": "^3.2.1",
     "lodash.snakecase": "^4.1.1",