This expands `SECURITY.md` to affirm the claims in the new
`SECURITY.md` files in gitdb and smmap that vulnerabilities found
in them can be reported in the GitPython repository with the same
link as one would use to report a GitPython vulnerability, as well
as to note how the distinction between affected package can be
specified when it is known at the time a vulnerability is reported.

Along with gitpython-developers/smmap#59
and gitpython-developers/gitdb#117, this
fixes gitpython-developers/gitdb#116.

This expands `SECURITY.md` to affirm the claims in the new
`SECURITY.md` files in gitdb and smmap that vulnerabilities found
in them can be reported in the GitPython repository with the same
link as one would use to report a GitPython vulnerability, as well
as to note how the distinction between affected package can be
specified when it is known at the time a vulnerability is reported.

Along with gitpython-developers/smmap#59
and gitpython-developers/gitdb#117, this
fixes gitpython-developers/gitdb#116.

This expands `SECURITY.md` to affirm the claims in the new
`SECURITY.md` files in gitdb and smmap that vulnerabilities found
in them can be reported in the GitPython repository with the same
link as one would use to report a GitPython vulnerability, as well
as to note how the distinction between affected package can be
specified when it is known at the time a vulnerability is reported.

Along with gitpython-developers/smmap#59
and gitpython-developers/gitdb#117, this
fixes gitpython-developers/gitdb#116.