source: Update extend-diff-ignore.

debian/changelog

@@ -4,6 +4,7 @@ freeipa (4.10.2+dfsg1-1) UNRELEASED; urgency=medium
   * control: Bump sssd, bind9 depends.
   * copyright, watch: Filter prebuilt html documentation from the
     tarball.
+  * source: Update extend-diff-ignore.
 
  -- Timo Aaltonen <tjaalton@debian.org>  Tue, 21 Feb 2023 10:13:42 +0200
 

debian/source/local-options

@@ -20,3 +20,5 @@ extend-diff-ignore = .lgtm.yml
 extend-diff-ignore = install/updates/30-ipservices.update|install/updates/75-user-trust-attributes.update
 # github
 extend-diff-ignore = .github/stale.yml
+# upstream signature verification
+extend-diff-ignore = gpgkey-*