linux-interrupts-2: Reduce word repetion

Reduce the repetion of words and set missing punctuation.

Signed-off-by: Sebastian Fricke <sebastian.fricke.linux@gmail.com>

Interrupts/linux-interrupts-2.md

@@ -83,7 +83,7 @@ vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o
 ...
 ```
 
-We can see here that `head_*` depends on the `$(BITS)` variable which depends on the architecture. You can find it in the [arch/x86/Makefile](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/Makefile):
+We can see here that `head_*` depends on the `$(BITS)` variable, which is based on the architecture. The variable is defined within [arch/x86/Makefile](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/Makefile):
 
 ```
 ifeq ($(CONFIG_X86_32),y)