Fix spelling of 'allows one to'

Fix spelling of 'allows one to'

Fix the following Lintian nags introduced in commit
c8d040938a7ebe10e62506a726702c5990ef4dda:

I: mariadb-backup: spelling-error-in-binary "allows to" "allows one to" [usr/bin/mariadb-backup]
I: mariadb-server-core: spelling-error-in-binary "allows to" "allows one to" [usr/sbin/mariadbd]
I: mariadb-test: spelling-error-in-binary "allows to" "allows one to" [usr/bin/mariadb-client-test-embedded]
I: mariadb-test: spelling-error-in-binary "allows to" "allows one to" [usr/bin/mariadb-test-embedded]
I: mariadb-test: spelling-error-in-binary "allows to" "allows one to" [usr/bin/test-connect-t]

Forwarded: no

Gbp-Pq: Name Fix-spelling-of-of-allows-one-to.patch