Fix readme (#37664)

Corrects bazel run command in README.
It does not match the bazel command in the BUILD file.

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Closes #37664

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37664 from nolasconapoleao:fix_interceptor_readme 42d828f2ec
PiperOrigin-RevId: 686223940

examples/cpp/interceptors/README.md

@@ -15,11 +15,11 @@ On the server-side, a very simple logging interceptor is added that simply logs
 To run the server -
 
 ```
-$ tools/bazel run examples/cpp/interceptors:server
+$ tools/bazel run examples/cpp/interceptors:keyvaluestore_server
 ```
 
 To run the client (on a different terminal) -
 
 ```
-$ tools/bazel run examples/cpp/interceptors:client
+$ tools/bazel run examples/cpp/interceptors:keyvaluestore_client
 ```