[SYCL] Bump sycl library minor version (#4520)

Increasing minor version of the DPCPP RT library as part of preparation
for September release.  Changing minor version only as there were no
backward incompatible changes.

sycl/CMakeLists.txt

@@ -13,7 +13,7 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
 include(AddSYCLExecutable)
 
 set(SYCL_MAJOR_VERSION 5)
-set(SYCL_MINOR_VERSION 3)
+set(SYCL_MINOR_VERSION 4)
 set(SYCL_PATCH_VERSION 0)
 set(SYCL_DEV_ABI_VERSION 0)
 if (SYCL_ADD_DEV_VERSION_POSTFIX)