start_item_riscv32: Fix typo in assembly comment

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

core/src/entry_point/start_item_riscv32.rs

diff --git a/core/src/entry_point/start_item_riscv32.rs b/core/src/entry_point/start_item_riscv32.rs
index d2c5fd1..9b57c76 100644
--- a/core/src/entry_point/start_item_riscv32.rs
+++ b/core/src/entry_point/start_item_riscv32.rs
@@ -78,7 +78,7 @@
     //
     // memop(11, stacktop + appdata_size);
     li  a0, 4               // a0 = 4   // memop syscall
-    li  a1, 11              // a1 = 10
+    li  a1, 11              // a1 = 11
     mv  a2, t1              // a2 = appdata_size
     ecall                   // memop
     //