update link for l10n to specify heptapod

readme-first.txt

@@ -16,7 +16,7 @@ The documentation for the extensions is located here: https://www.mercurial-scm.
 
 While use is discouraged it is still the best and flexible way to apply and maintain a larger patch queue for stuff.
 
-The l10n-release directory contains patches which you can apply against a clone of https://hg.mozilla.org/releases/l10n/mozilla-release/<language>. These are only needed if you want to build a language specific version.
+The l10n-release directory contains patches which you can apply against a clone of https://foss.heptapod.net/seamonkey/l10n-release. These are only needed if you want to build a language specific version.
 
 If you want to help out with backporting and submit changes for inclusion please contact us at ircs://libera.chat/SeaMonkey . For new functionality and error fixes in SeaMonkey itself please file a bug in https://bugzilla.mozilla.org/ under product SeaMonkey, attach you patch and ask for review or feedback.