Update SUMMARY.md (#9)

Author: Loken1016

src/SUMMARY.md

@@ -21,9 +21,9 @@ more information and coordination
 - [Empezando](./start/index.md)
   - [QEMU](./start/qemu.md)
   - [Hardware](./start/hardware.md)
-  - [Memory-mapped Registers](./start/registers.md)
+  - [Mapeo de registros de memoria](./start/registers.md)
   - [Semihosting](./start/semihosting.md)
-  - [Panicking](./start/panicking.md)
+  - [Produciendo el panico](./start/panicking.md)
   - [Exceptions](./start/exceptions.md)
   - [Interrupts](./start/interrupts.md)
   - [IO](./start/io.md)