Fix coverity scan issue CID 1566608 (#28254)

### Details:
 - This PR fixes coverity issue with CID 1566608

### Tickets:
 - [CVS-158856](https://jira.devtools.intel.com/browse/CVS-158856)

src/plugins/intel_cpu/src/transformations/snippets/x64/pass/lowered/insert_brgemm_copy_buffers.cpp

@@ -58,6 +58,7 @@ bool InsertBrgemmCopyBuffers::run(LinearIR& linear_ir, LinearIR::constExprIt beg
 
         const auto vnni_factor = brgemm_utils::compute_vnni_factor(src_dt);
         const auto inner_k_blk = brgemm_utils::repacking::compute_inner_k_block(src_dt);
+        OPENVINO_ASSERT(inner_k_blk > 0, "inner_k_blk cannot be zero!");
         const auto tile_scratch_size = BrgemmCPU::SCRATCH_BYTE_SIZE;
         const auto current_scratch_size = scratch_expr->get_byte_size();
         OPENVINO_ASSERT(current_scratch_size == tile_scratch_size,