Document: assign7-kvm-vmm: fix typo

Signed-off-by: hanyujie2002 <yujiehan2002@outlook.com>

Documentation/teaching/so2/assign7-kvm-vmm.rst

@@ -115,7 +115,7 @@ most programs nowdays need 64 bits addresses, and such we will need to switch to
 
 In ``vcpu.h``, you may found helpful macros such as CR0_PE, CR0_MP, CR0_ET, etc. 
 
-Since we will running a more complex program, we will also create a small stack for our program
+Since we will run a more complex program, we will also create a small stack for our program
 ``regs.rsp = 1 << 20;``. Don't forget to set the RIP and RFLAGS registers.
 
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