LatinIME: Fix Czech QWERTY keyboard (missing no. 6)

    <string name="more_keys_for_s">š</string>

    <string name="more_keys_for_n">ň</string>

    <string name="more_keys_for_c">č</string>

    <string name="more_keys_for_y">ý</string>

    <string name="more_keys_for_y">6,ý</string>

    <string name="more_keys_for_d">ď</string>

    <string name="more_keys_for_r">4,ř</string>

    <string name="more_keys_for_t">5,ť</string>

    <string name="more_keys_for_z">6,ž</string>

    <string name="more_keys_for_z">ž</string>

</resources>