doc: caplog: add caplog.messages (#5963)
doc: caplog: add caplog.messages (#5963)

doc: caplog: add caplog.messages
Akasurde/pytest,alfredodeza/pytest,RonnyPfannschmidt/pytest,markshao/pytest,The-Compiler/pytest,nicoddemus/pytest,The-Compiler/pytest,nicoddemus/pytest,pytest-dev/pytest