Fix site "usage" page

[pzygielo]

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the Apache License Version 2.0, January 2004
you have to acknowledge this by using the following check-box.

• I hereby declare this contribution to be licenced under the Apache License Version 2.0, January 2004

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previously:

• Fix site "usage" page #18

after:

• [MEJB-138] Update parent pom to 42 and dependencies #32

[pzygielo]

Thanks for checking.
Fixed spotless.