Meta/cook: update cover-letter boilerplate

cook

@@ -273,31 +273,10 @@ only in 'pu' (proposed updates) while commits prefixed with '+' are in 'next'.
 The ones marked with '.' do not appear in any of the integration branches,
 but I am still holding onto them.
 
-Here are the repositories that have my integration branches:
+You can find the changes described here in the integration branches of the
+repositories listed at
 
-With maint, master, next, pu, and todo:
-
-        git://git.kernel.org/pub/scm/git/git.git
-        git://repo.or.cz/alt-git.git
-        https://code.google.com/p/git-core/
-        https://github.com/git/git
-
-With only maint and master:
-
-        git://git.sourceforge.jp/gitroot/git-core/git.git
-        git://git-core.git.sourceforge.net/gitroot/git-core/git-core
-
-With all the topics and integration branches but not todo, html or man:
-
-        https://github.com/gitster/git
-
-For convenience, preformatted documentation in html and manpage format
-are found in their own separate repositories:
-
-        git://git.kernel.org/pub/scm/git/git-{htmldocs,manpages}.git/
-        git://repo.or.cz/git-{htmldocs,manpages}.git/
-        https://code.google.com/p/git-{htmldocs,manpages}.git/
-        https://github.com/gitster/git-{htmldocs,manpages}.git/
+    http://git-blame.blogspot.com/p/git-public-repositories.html
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