Fix typos in messages when an upgrade is available
Fix typos in messages when an upgrade is available

When there is an updated package that fixes a vulnerability, the output
currently ends with something like

    High risk!. Update to 244.2-1!

Replace "!." with a single exclamation mark. Also, add a missing "the"
to the message that is displayed when the updated package is in the
testing repositories.

ilpianista/arch-audit