gnucash-docs: New annotated tag '4.2'

[John Ralls]

        at  https://github.com/Gnucash/gnucash-docs/tree/3df4e80d801663b92cfc7f869bc682c64d8d398e (tag)
   tagging  4f86baf78e1503f0820f6d5030f6f4ff2e547853 (commit)
  replaces  4.1
 tagged by  John Ralls
        on  Sat Sep 26 16:14:18 2020 -0700


Tag Documentation Release 4.2

John Ralls (2):
      Add an install target for html.
      Release Documentation for GnuCash 4.2