ci install: drop support for Ubuntu 21.04(Hirsute Hippo) and  21.10 (Impish Indri)
ci install: drop support for Ubuntu 21.04(Hirsute Hippo) and  21.10 (Impish Indri)

Because they reached EOL.

mroonga/mroonga,mroonga/mroonga,mroonga/mroonga,mroonga/mroonga