Change "customer code" to "user code" in documentation

Author: schittir

clang/include/clang/Basic/AttrDocs.td

@@ -3044,8 +3044,8 @@ Global or static variables of type decorated with this attribute have
 `sycl-unique-id`, an LLVM IR attribute, added to the definition of each such
 variable, which provides a unique string identifier using
 __builtin_sycl_unique_stable_id.
-We do not intend to support this as a general attribute that customer code can
-use, so we have this attribute in sycl_detail namespace.
+We do not intend to support this as a general attribute that user code can use,
+so we have this attribute in sycl_detail namespace.
 
 .. code-block:: c++
 
@@ -3064,7 +3064,7 @@ This attribute is part of support for SYCL device_global feature.
 [[__sycl_detail__::global_variable_allowed]] attribute is used to avoid
 diagnosing an error when global or static variables of type decorated with this
 attribute are referenced in device code. We do not intend to support this as a
-general attribute that customer code can use, therefore it is wrapped in
+general attribute that user code can use, therefore it is wrapped in
 sycl_detail namespace.
 
 .. code-block:: c++