Fix the break caused by ACL Opencl header update

* Headers were updated in https://review.mlplatform.org/c/ml/ComputeLibrary/+/6751
* Update ACL pin to dc2282f40b40c0d85b113c792f90d1faa2759f46

Signed-off-by: Nikhil Raj <nikhil.raj@arm.com>
Change-Id: I1ff5d017e1921e5acbf7a5a54abc57d165fa5269
diff --git a/cmake/GlobalConfig.cmake b/cmake/GlobalConfig.cmake
index 1dc2d67..2c5bc83 100644
--- a/cmake/GlobalConfig.cmake
+++ b/cmake/GlobalConfig.cmake
@@ -295,7 +295,7 @@
     message(STATUS "Flatbuffers library located at: ${FLATBUFFERS_LIBRARY}")
 
     # Always use Arm compute library OpenCL headers
-    find_path(OPENCL_INCLUDE CL/cl2.hpp
+    find_path(OPENCL_INCLUDE CL/opencl.hpp
               PATHS ${ARMCOMPUTE_ROOT}/include
               NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)