fix(allowlist_db): Improve DynamoDB regex for allowlisting. (#1127)

include/allowlist

@@ -16,7 +16,7 @@ allowlist(){
   if grep -q -E "^s3://([^/]+)/(.*?([^/]+))$" <<< "${ALLOWLIST_FILE}"; then
     allowlist_S3
   # Check if the file is a DynamoDB ARN
-  elif grep -q -E "^arn:aws:dynamodb:\w+(?:-\w+)+:\d{12}:table\/[-._A-Za-z0-9]+$" <<< "${ALLOWLIST_FILE}"; then
+  elif grep -q -E "^arn:[aws\|aws\-cn\|aws\-us\-gov]+:dynamodb:[a-z]{2}-[north\|south\|east\|west\|central]+-[1-9]{1}:[0-9]{12}:table\/[a-zA-Z0-9._-]+$" <<< "${ALLOWLIST_FILE}"; then
     allowlist_DynamoDB
   else
     # Check if the file is a DynamoDB ARN
@@ -79,4 +79,4 @@ allowlist_Textfile() {
     EXITCODE=1
     exit ${EXITCODE}
   fi
-}
+}