chore(ci): new pre-release 3.18.1a4 (#7105)

Co-authored-by: Powertools for AWS Lambda (Python) bot <[email protected]>
Co-authored-by: Leandro Damascena <[email protected]>

Author: 3 people

aws_lambda_powertools/shared/version.py

@@ -1,3 +1,3 @@
 """Exposes version constant to avoid circular dependencies."""
 
-VERSION = "3.18.1a3"
+VERSION = "3.18.1a4"