docs: image build clarifications/grammar (#2489)
docs: image build clarifications/grammar (#2489)

I changed was build > was built and reorganized a few sentences to be more clear.

Signed-off-by: InnovativeInventor <1ba5cfd8ea97ac5235766f25488c7cd9a1adac45@gmail.com>
docker/docker-py,docker/docker-py