fix: upgrade io.grpc:grpc-protobuf from 1.66.0 to 1.68.0 (#219)

Snyk has created this PR to upgrade io.grpc:grpc-protobuf from 1.66.0 to 1.68.0.

See this package in maven:
io.grpc:grpc-protobuf

See this project in Snyk:
https://app.snyk.io/org/vald/project/223639f4-53f7-46f6-a48f-9e663b44ef5a?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <[email protected]>
Co-authored-by: Kosuke Morimoto <[email protected]>

Author: 3 people

pom.xml

@@ -81,7 +81,7 @@
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>1.66.0</version>
+      <version>1.68.0</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>