Update cryptographic CODEOWNERS entry

[picnixz]

I observed that I wasn't notified automatically when HACL* sources are touched so I'm adding myself to the codeowners.

Note that the **/sha* pattern also matched Lib/multiprocessing/shared_memory.py, but since Gregory is already an mp-expert, it was probably never noticed (and tiran is no more active). So I'm refining the pattern so that we're only picking up SHA-related files.

In addition, I'm adding an entry for SSL-related stuff (@gpshead I added you as well but feel free to edit the PR directly if you don't want to be notified for SSL-related changes). **/*ssl* picks up quite a lot of files but I think, possibly except for Lib/asyncio/sslproto.py, we should be considered code owners (or at least relevant people to tag when modifying such files):

Doc/library/ssl.rst
Lib/asyncio/sslproto.py
Lib/ssl.py
Lib/test/certdata/make_ssl_certs.py
Lib/test/certdata/ssl_cert.pem
Lib/test/certdata/ssl_key.passwd.pem
Lib/test/certdata/ssl_key.pem
Lib/test/ssl_servers.py
Lib/test/ssltests.py
Lib/test/test_asyncio/test_ssl.py
Lib/test/test_asyncio/test_sslproto.py
Lib/test/test_ssl.py
Misc/rhel7/openssl.pc
Modules/_hashopenssl.c
Modules/_ssl.c
Modules/_ssl.h
Modules/_ssl/cert.c
Modules/_ssl/clinic/cert.c.h
Modules/_ssl/debughelpers.c
Modules/_ssl/misc.c
Modules/_ssl_data_111.h
Modules/_ssl_data_300.h
Modules/_ssl_data_34.h
Modules/clinic/_hashopenssl.c.h
Modules/clinic/_ssl.c.h
PCbuild/_ssl.vcxproj
PCbuild/_ssl.vcxproj.filters
PCbuild/openssl.props
PCbuild/openssl.vcxproj
PCbuild/prepare_ssl.bat
PCbuild/prepare_ssl.py
Tools/ssl/make_ssl_data.py
Tools/ssl/multissltests.py

NB: I observed that I never added myself to ACKS, so I'm taking this commit as an opporunity as well.

NB2: the reason why we have Modules/*sha* and not Modules/sha* is to also be notified when clinic files are changed for whatever reasons (compare git ls-files 'Modules/*sha*' and git ls-files 'Modules/sha*').