Bump gradle.plugin.com.github.johnrengelman:shadow from 7.1.2 to 8.0.0 in /examples/distro (#7922)

Bumps gradle.plugin.com.github.johnrengelman:shadow from 7.1.2 to 8.0.0.


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examples/distro/build.gradle

@@ -13,7 +13,7 @@ buildscript {
   }
   dependencies {
     classpath "com.diffplug.spotless:spotless-plugin-gradle:6.16.0"
-    classpath "gradle.plugin.com.github.johnrengelman:shadow:7.1.2"
+    classpath "gradle.plugin.com.github.johnrengelman:shadow:8.0.0"
     classpath "io.opentelemetry.instrumentation:gradle-plugins:1.24.0-alpha-SNAPSHOT"
   }
 }