releaser: Add release notes draft for 0.39
releaser: Add release notes draft for 0.39

Rename to *-ready.md to continue. [ci skip]

mdhender/hugo,anthonyfok/hugo,gohugoio/hugo,fedelibre/hugo,gohugoio/hugo,mdhender/hugo,anthonyfok/hugo,anthonyfok/hugo,mdhender/hugo,gohugoio/hugo,fedelibre/hugo,fedelibre/hugo,mdhender/hugo,fedelibre/hugo