Bump com.squareup.okio:okio from 3.9.0 to 3.9.1 (#3866)

Author: dependabot[bot]

agent/agent-tooling/build.gradle.kts

@@ -62,7 +62,7 @@ dependencies {
   testImplementation("io.opentelemetry:opentelemetry-sdk-testing")
 
   // TODO(trask): update tests, no need to use this anymore
-  testImplementation("com.squareup.okio:okio:3.9.0")
+  testImplementation("com.squareup.okio:okio:3.9.1")
 
   compileOnly(project(":agent:agent-bootstrap"))
   compileOnly("io.opentelemetry.instrumentation:opentelemetry-instrumentation-api")