docs: Rename wrong POWERTOOLS_DISABLE_METRICS to correct POWERTOOLS_METRICS_DISABLED environment variable. (#2043)

Author: phipag

docs/core/metrics.md

@@ -540,15 +540,15 @@ The following example shows how to configure a custom `Metrics` Singleton using
 
 ### Suppressing metrics output
 
-If you would like to suppress metrics output during your unit tests, you can use the `POWERTOOLS_DISABLE_METRICS` environment variable. For example, using Maven you can set in your build plugins:
+If you would like to suppress metrics output during your unit tests, you can use the `POWERTOOLS_METRICS_DISABLED` environment variable. For example, using Maven you can set in your build plugins:
 
 ```xml
 <plugin>
     <groupId>org.apache.maven.plugins</groupId>
     <artifactId>maven-surefire-plugin</artifactId>
     <configuration>
         <environmentVariables>
-            <POWERTOOLS_DISABLE_METRICS>true</POWERTOOLS_DISABLE_METRICS>
+            <POWERTOOLS_METRICS_DISABLED>true</POWERTOOLS_METRICS_DISABLED>
         </environmentVariables>
     </configuration>
 </plugin>

docs/index.md

@@ -10,7 +10,7 @@ Powertools for AWS Lambda (Java) is a suite of utilities for AWS Lambda Function
 
 
 ???+ tip "Looking for a quick run through of the core utilities?"
-    Check out [this detailed blog post](https://aws.amazon.com/blogs/opensource/simplifying-serverless-best-practices-with-aws-lambda-powertools-java/) with a practical example. To dive deeper, 
+    Check out [this detailed blog post](https://aws.amazon.com/blogs/compute/introducing-v2-of-powertools-for-aws-lambda-java/) with a practical example. To dive deeper, 
     the [Powertools for AWS Lambda (Java) workshop](https://catalog.us-east-1.prod.workshops.aws/workshops/a7011c82-e4af-4a52-80fa-fcd61f1dacd9/en-US/introduction) is a great next step.
 
 ## Tenets