docs: Update springbok GDB instructions

Change-Id: I756a8f3f5f909214cc7b78b769815929078025de

CreateSpringbokVectorUnitTest.md

diff --git a/CreateSpringbokVectorUnitTest.md b/CreateSpringbokVectorUnitTest.md
index 859efce..3b3f4da 100644
--- a/CreateSpringbokVectorUnitTest.md
+++ b/CreateSpringbokVectorUnitTest.md
@@ -193,10 +193,10 @@
 ```sh
 sim_springbok ./out/springbok/tests/vadd_test.elf debug
 ```
-Alternatively, start Qemu Simulation:
+Alternatively, start Qemu simulation:
 
 ```sh
-qemu_sim_springbok ./out/springbok/tests/vadd_test.elf debug
+qemu_sim_springbok ./out/springbok/tests/vadd_test.elf -s -S
 ```
 
 Now, in the other console session run the following command to start a gdb session:
@@ -205,6 +205,12 @@
 cache/toolchain/bin/riscv32-unknown-elf-gdb -ex "target remote :3333" out/springbok/tests/vadd_test.elf
 ```
 
+Note: To run GDB with the Qemu simulation, use
+
+```sh
+cache/toolchain/bin/riscv32-unknown-elf-gdb -ex "target remote :1234" out/springbok/tests/vadd_test.elf
+```
+
 First, in the Renode session, type `start`.
 
 Then, in the gdb session, type the following,