added a 40 char string value

Author: scmacdon

.doc_gen/validation.yaml

@@ -5,6 +5,7 @@ allow_list:
   - "e9772d140489982e0e3704fea5ee93d536f1e275"
   # Safe look-alikes, mostly tokens and paths that happen to be 40 characters.
   - "/AmazonEventBridgeServiceIntegrationTest"
+  - "https://docs.aws.amazon.com/location/latest/developerguide/using-apikeys.html"
   - "erbucketf684533d2680435fa99d24b1bdaf5179"
   - "/ListOrganizationalUnitsForParentExample"
   - "AmazonDataZoneBedrockPermissionsBoundary"