Map examples in One Minute Starting Guide use wrong API

[krzysztof-jelski]

Currently it is:

assertThat(ringBearers).hasSize(4)
                       .includes(entry(Ring.oneRing, frodo), entry(Ring.nenya, galadriel))
                       .excludes(entry(Ring.oneRing, aragorn));

and it should be:

assertThat(ringBearers).hasSize(4)
                       .contains(entry(Ring.oneRing, frodo), entry(Ring.nenya, galadriel))
                       .doesNotContain(entry(Ring.oneRing, aragorn));