Update documentation to generalize extension

The updated documentation makes it clear that the extension is not
explicitly for the Java Agent, but can be used without it as well.

Author: psx95

gcp-auth-extension/README.md

@@ -1,6 +1,6 @@
-# Google Cloud Authentication Extension for OpenTelemetry Java Agent
+# Google Cloud Authentication Extension
 
-The Google Cloud Auth Extension allows the users to export telemetry from their applications auto-instrumented using the OpenTelemetry Java Agent to Google Cloud using the built-in OTLP exporters.
+The Google Cloud Auth Extension allows the users to export telemetry from their applications to Google Cloud using the built-in OTLP exporters.\
 The extension takes care of the necessary configuration required to authenticate to GCP to successfully export telemetry.
 
 ## Prerequisites
@@ -90,7 +90,7 @@ dependencies {
     implementation("io.opentelemetry:opentelemetry-sdk")
     implementation("io.opentelemetry:opentelemetry-exporter-otlp")
     implementation("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure")
-    // use the shaded variant of the dependency
+    // include the auth extension dependency
     implementation("io.opentelemetry.contrib:opentelemetry-gcp-auth-extension")
 
     // other dependencies

gcp-auth-extension/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
   id("org.springframework.boot") version "2.7.18"
 }
 
-description = "OpenTelemetry Java Agent Extension that enables authentication support for OTLP exporters"
+description = "OpenTelemetry extension that provides GCP authentication support for OTLP exporters"
 otelJava.moduleName.set("io.opentelemetry.contrib.gcp.auth")
 
 val agent: Configuration by configurations.creating {