Bump ch.qos.logback:logback-classic from 1.4.5 to 1.4.6 in /examples/distro (#8062)

Bumps
[ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from
1.4.5 to 1.4.6.
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examples/distro/smoke-tests/build.gradle

@@ -10,7 +10,7 @@ dependencies {
   testImplementation("io.opentelemetry.proto:opentelemetry-proto:0.19.0-alpha")
   testImplementation("io.opentelemetry:opentelemetry-api:${versions.opentelemetry}")
 
-  testImplementation("ch.qos.logback:logback-classic:1.4.5")
+  testImplementation("ch.qos.logback:logback-classic:1.4.6")
 }
 
 tasks.test {