contribute: Remove reference to social-contract@gnu.tools.

As per discussion with Mark Wielaard, the process is to file a
subscription request, which is then handled by mailing list admins.

* contribute.md: Remove social-contract@gnu.tools from step 1.

1 files changed, 4 insertions, 4 deletions

diff --git a/contribute.md b/contribute.md
index ad48f62..ddae0b9 100644
--- a/contribute.md
+++ b/contribute.md
@@ -9,10 +9,10 @@ If you are a maintainer or contributor to a GNU package sharing the
 same vision as we do, we’d love to have you on board!  The steps to join
 the Assembly are as follows:
 
-  1. Read the [Social Contract](/en/documents/social-contract) and email
-     `social-contract@gnu.tools` to explicitly endorse it.  Endorsement
-     allows us to make sure we’re all on the same page, following the
-     same goals.
+  1. Read the [Social Contract](/en/documents/social-contract).
+     Participants in the Assembly are required to endorse it.
+     Endorsement allows us to make sure we’re all on the same page,
+     following the same goals and sharing the same values.
   2. Subscribe to [the Assembly mailing
      list](https://lists.gnu.tools/hyperkitty/list/assembly@lists.gnu.tools/)
      and check out the [code of conduct](/en/documents/code-of-conduct)