fix: Remove content type image/jpg from analysis configuration schema (aws#3530)

Currently the analysis configuration schema of SageMaker Clarify API
allows the content_type configuration "image/jpeg" and "image/jpg",
but the service side validation only accepts the former which is the
registered MIME type for JPEG (see rfc3745 and JPEG specification).
The commit removes the latter from the schema to avoid confusion and
enable early API validation.

Author: xgchena

src/sagemaker/clarify.py

@@ -282,7 +282,6 @@
                     "text/csv",
                     "application/jsonlines",
                     "image/jpeg",
-                    "image/jpg",
                     "image/png",
                     "application/x-npy",
                 ),