Update howm.rcp

[lispstudent]

Amend recipe, as Howm moved to GitHub.

Installation tested on MacOS with Emacs 30:

el-get install howm
el-get: Package howm installed.
el-get: git submodule update ok
el-get: el-get-build howm: ./configure --with-emacs=/opt/homebrew/Cellar/emacs-plus@30/30.0.60/Emacs.app/Contents/MacOS/Emacs ok.
el-get: el-get-build howm: make ok.
el-get: el-get-build howm: byte-compile ok.
el-get: updating autoloads for howm
  INFO     Scraping files for .loaddefs.el... 
Generating autoloads for howm/action-lock.el...done
Generating autoloads for howm/bcomp.el...done
Generating autoloads for howm/cheat-font-lock.el...done
Generating autoloads for howm/gfunc.el...done
Generating autoloads for howm/honest-report.el...done
Generating autoloads for howm/howm-backend.el...done
Generating autoloads for howm/howm-common.el...done
Generating autoloads for howm/howm-date.el...done
Generating autoloads for howm/howm-lang-en.el...done
Generating autoloads for howm/howm-lang-fr.el...done
Generating autoloads for howm/howm-lang-ja.el...done
Generating autoloads for howm/howm-menu-en.el...done
Generating autoloads for howm/howm-menu-fr.el...done
Generating autoloads for howm/howm-menu-ja.el...done
Generating autoloads for howm/howm-menu.el...done
Generating autoloads for howm/howm-misc.el...done
Generating autoloads for howm/howm-mkmenu.el...done
Generating autoloads for howm/howm-mode.el...done
Generating autoloads for howm/howm-reminder.el...done
Generating autoloads for howm/howm-vars.el...done
Generating autoloads for howm/howm-view.el...done
Generating autoloads for howm/howm.el...done
Generating autoloads for howm/iigrep.el...done
Generating autoloads for howm/illusion.el...done
Generating autoloads for howm/riffle.el...done
  INFO     Scraping files for .loaddefs.el...done
Wrote /Users/user/.config/emacs/el-get/.loaddefs.el [2 times]
el-get: byte-compiling autoload file
Compiling /Users/user/.config/emacs/el-get/.loaddefs.el...done
Wrote /Users/user/.config/emacs/el-get/.loaddefs.elc
howm installed: This package has been installed successfully by el-get.

[alexott]

Thank you!

[lispstudent]

Thank you @alexott for your untiring help here with el-get.