HOWTORELEASE.tst: use restructuredtext autonumbering
HOWTORELEASE.tst: use restructuredtext autonumbering

pfctdayelise/pytest,nicoddemus/pytest,hackebrot/pytest,markshao/pytest,MichaelAquilina/pytest,tareqalayan/pytest,flub/pytest,tomviner/pytest,tomviner/pytest,Akasurde/pytest,The-Compiler/pytest,ddboline/pytest,txomon/pytest,rmfitzpatrick/pytest,pytest-dev/pytest,nicoddemus/pytest,RonnyPfannschmidt/pytest,davidszotten/pytest,The-Compiler/pytest,alfredodeza/pytest