docs: update layers version + simplify script

[leandrodamascena]

Summary

Changes

Please provide a summary of what's being changed

This PR updates the script at .github/scripts/update_layer_arn.sh so that it doesn't need to perform lots of unnecessary checks and replaces.

The PR also restores the correct Lambda layer ARN version, which is 29.

Please add the issue number below, if no issue is present the PR might get blocked and not be reviewed

Issue number: closes #4035 closes #3890

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[leandrodamascena]

Please do not merge yet, I'm testing in linux environments just to make sure everything is working.

[leandrodamascena]

It's working, you can review @dreamorosi.

[root@ip-10-20-43-152 powertools-lambda-typescript]# .github/scripts/update_layer_arn.sh
Usage: .github/scripts/update_layer_arn.sh <new_version>
[root@ip-10-20-43-152 powertools-lambda-typescript]# .github/scripts/update_layer_arn.sh 100 > /dev/null
[root@ip-10-20-43-152 powertools-lambda-typescript]# git status
On branch main
Your branch is up to date with 'origin/main'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   docs/getting-started/lambda-layers.md
	modified:   examples/app/cdk/example-stack.ts
	modified:   examples/app/template.yaml

no changes added to commit (use "git add" and/or "git commit -a")
[root@ip-10-20-43-152 powertools-lambda-typescript]# git diff examples/app/template.yaml
diff --git a/examples/app/template.yaml b/examples/app/template.yaml
index e9f0c3a5..e4c7b8d4 100644
--- a/examples/app/template.yaml
+++ b/examples/app/template.yaml
@@ -130,7 +130,7 @@ Resources:
         - DynamoDBReadPolicy:
             TableName: !Ref itemsTable
       Layers:
-        - !Sub arn:aws:lambda:${AWS::Region}:094274105915:layer:AWSLambdaPowertoolsTypeScriptV2:3
+        - !Sub arn:aws:lambda:${AWS::Region}:094274105915:layer:AWSLambdaPowertoolsTypeScriptV2:100
       Environment:
         Variables:
           TABLE_NAME: !Ref itemsTable
[root@ip-10-20-43-152 powertools-lambda-typescript]# 

[github-actions]

@aws-powertools/lambda-typescript No related issues found. Please ensure 'pending-release' label is applied before releasing.