Update README.md

[kmwhite]

Change Description

Extend the --disable-sse2 comment to also include ARM64-based linux releases. Without this, the following error occurs:

libtool: compile:  gcc -DHAVE_CONFIG_H -I.. -I/usr/local/include -Wall -Wextra -Wno-unused-function -Wformat -Werror=format-security -Winit-self -Wno-sign-compare -DLIBPOSTAL_DATA_DIR=\"/home/ec2-user/libpostal-training/libpostal\" -g -mfpmath=sse -msse2 -DUSE_SSE -g -O2 -O2 -D LIBPOSTAL_EXPORTS -MT libpostal_la-address_dictionary.lo -MD -MP -MF .deps/libpostal_la-address_dictionary.Tpo -c address_dictionary.c  -fPIC -DPIC -o .libs/libpostal_la-address_dictionary.o
libtool: compile:  gcc -DHAVE_CONFIG_H -I.. -I/usr/local/include -Wall -Wextra -Wno-unused-function -Wformat -Werror=format-security -Winit-self -Wno-sign-compare -DLIBPOSTAL_DATA_DIR=\"/home/ec2-user/libpostal-training/libpostal\" -g -mfpmath=sse -msse2 -DUSE_SSE -g -O2 -O2 -D LIBPOSTAL_EXPORTS -MT libpostal_la-expand.lo -MD -MP -MF .deps/libpostal_la-expand.Tpo -c expand.c  -fPIC -DPIC -o .libs/libpostal_la-expand.o
make[2]: *** [libpostal_la-strndup.lo] Error 1
gcc: error: unrecognized command line option '-mfpmath=sse'
gcc: error: unrecognized command line option '-msse2'
gcc: error: unrecognized command line option '-mfpmath=sse'
gcc: error: unrecognized command line option '-msse2'
make[2]: *** [libpostal_la-expand.lo] Error 1
make[2]: *** [libpostal_la-address_dictionary.lo] Error 1
make[2]: Leaving directory `/home/ec2-user/libpostal/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/ec2-user/libpostal'
make: *** [all] Error 2

Pull request questions

Which issue does this address

N/A; Documentation update

Why was change needed

To clarify when to use the --disable-sse2 flag during compilation

What does change improve

Documentation for installation

[missinglink]

Thanks 🙏