chore(release): expand lab08 github assets

chore(changelog): add v8.0.0 entry for lab08

feat(lab08): add discrete event SIR project and materials

chore(changelog): add v7.0.0 entry for lab07

feat(lab07): add discrete event modeling project and materials

add doclad-mat materials

chore(changelog): add v6.0.0 entry for lab06

feat(lab06): add SIR petri net project and materials

chore(changelog): add v5.0.0 entry for lab05

feat(lab05): add petri net dining philosophers materials