Add 'ExAllocatePool' to blocklist due to deprecation

[joaoviictorti]

Hi, I've made a small addition to the list to include an obsolete WinAPI function: ExAllocatePool, which wasn't previously mentioned.

Reference: https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-exallocatepool