docs(CHANGES): Fix internal links
docs(CHANGES): Fix internal links

docutils wants headers that begin with a letter and gt/lt signs

cat CHANGES | sed s/"<\(201[5-9]\|2020\)"/"\(\1"/g | sed s/">$"/"\)"/g | \
    sed 's/^[0-1]\..*/vcspull &/g' | sed 's/^---/&--------/g' > CHANGES

tony/vcspull,tony/vcspull