Update grpcio requirement

---
updated-dependencies:
- dependency-name: grpcio
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <support@github.com>

testsuite/requirements-grpc-3.txt

@@ -1,3 +1,3 @@
-grpcio >= 1.32.0, <= 1.49.0
+grpcio >= 1.32.0, <= 1.66.0
 grpcio-tools >= 1.32.0, <= 1.49.0
 protobuf >= 3.12.0, < 4.0dev