[gimp] devel-docs: some small release-howto updates.

[Jehan <jehanp src gnome org>]

commit 50a0f497620aedc89a0db44452f60ffeb8f25a3a
Author: Jehan <jehan girinstud io>
Date:   Wed Dec 23 01:54:10 2020 +0100

    devel-docs: some small release-howto updates.

 devel-docs/release-howto.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/devel-docs/release-howto.txt b/devel-docs/release-howto.txt
index bf4f6920d4..e848c919c0 100644
--- a/devel-docs/release-howto.txt
+++ b/devel-docs/release-howto.txt
@@ -122,6 +122,8 @@
        git tag -s GIMP_2_x_y
        git push origin GIMP_2_x_y
 
+     TODO: determine what should be the policy regarding tag signing.
+
  ( ) Bump the version number (past the tagged version) in configure.ac
      to the next odd micro and commit this change. GIT versions always
      have odd micro numbers.
@@ -157,7 +159,8 @@
          this group to correct mistakes and to update the
          0.0_LATEST-IS- file next time.
 
- ( ) Add the new version to the GIMP product on bugzilla.gimp.org.
+ ( ) Add the next version milestone on GIMP's Gitlab:
+     https://gitlab.gnome.org/GNOME/gimp/-/milestones
 
  ( ) Check out or update the 'gimp-web' module, check out its testing
      branch.