Fix compilation error in 32-bit with logging build

* Use %zu format specifier for size_t data.

Resolves: COMPMID-5377
Change-Id: I84e6aea8ab34ca4616eeecfb06d573eaa329bd67
Signed-off-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/7649
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/IScheduler.cpp b/src/runtime/IScheduler.cpp
index 1d068c9..39f4155 100644
--- a/src/runtime/IScheduler.cpp
+++ b/src/runtime/IScheduler.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2021 Arm Limited.
+ * Copyright (c) 2016-2022 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -188,7 +188,7 @@
                 recommended_split_dim = dims;
             }
         }
-        ARM_COMPUTE_LOG_INFO_MSG_WITH_FORMAT_CORE("%lu dimension is not a suitable dimension to split the workload. Recommended: %lu recommended_split_dim", split_dimension,
+        ARM_COMPUTE_LOG_INFO_MSG_WITH_FORMAT_CORE("%zu dimension is not a suitable dimension to split the workload. Recommended: %zu recommended_split_dim", split_dimension,
                                                   recommended_split_dim);
     }