Update dependency io.grpc:grpc-bom to v1.51.1

Author: renovate[bot]

sigstore-java/build.gradle.kts

@@ -21,7 +21,7 @@ dependencies {
     implementation("io.github.erdtman:java-json-canonicalization:1.1")
 
     // grpc deps
-    implementation(platform("io.grpc:grpc-bom:1.51.0"))
+    implementation(platform("io.grpc:grpc-bom:1.51.1"))
     implementation("io.grpc:grpc-protobuf")
     implementation("io.grpc:grpc-stub")
     runtimeOnly("io.grpc:grpc-netty-shaded")