Linking to official Lambda extension documentation (#2316)

Author: eyalkoren

docs/setup-aws-lambda.asciidoc

@@ -25,9 +25,9 @@ Setting up your Lambda function is a two-step process.
 Elastic uses a Lambda extension to forward data to APM Server in a way that does not interfere with the
 execution of your Lambda function.
 
-See the https://github.com/elastic/apm-aws-lambda/blob/main/docs/aws-lambda-extension.asciidoc[installation documentation] to get started.
+See the https://www.elastic.co/guide/en/apm/guide/current/aws-lambda-extension.html[installation documentation] to get started.
 
-NOTE: Not all environment variables specified within https://github.com/elastic/apm-aws-lambda/blob/main/docs/aws-lambda-extension.asciidoc#the-necessary-variables[The Necessary Variables]
+NOTE: Not all environment variables specified within https://www.elastic.co/guide/en/apm/guide/current/aws-lambda-extension.html#aws-lambda-variables[The Necessary Variables]
 section of the extension documentation need to be configured. The Java agent utilizes a https://docs.aws.amazon.com/lambda/latest/dg/runtimes-modify.html[wrapper script]
 to set some of these up, so follow the next section to see which are required.