docs: Update the release procedure to include release candidates [skip ci]
docs: Update the release procedure to include release candidates [skip ci]

Fixes #6456

jpakkane/meson,pexip/meson,becm/meson,jpakkane/meson,QuLogic/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,becm/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,becm/meson,jpakkane/meson,pexip/meson,pexip/meson,jpakkane/meson,QuLogic/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,jpakkane/meson,becm/meson,becm/meson,mesonbuild/meson,QuLogic/meson,becm/meson,QuLogic/meson,becm/meson,pexip/meson,becm/meson,QuLogic/meson,becm/meson,becm/meson,pexip/meson,pexip/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson