[PATCH 5/8] ref-manual/classes.rst: replace obsolete mailing list thread

I found this one by looking at the archive of the link on
https://web.archive.org and then locating the thread on
lists.yoctoproject.org by its title.

Signed-off-by: Antonin Godard <[email protected]>
---
 documentation/ref-manual/classes.rst | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index f826bbdbc..02ff36178 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -2053,11 +2053,8 @@ consider some further things about using RPM:
    perform on-device upgrades.
 
 You can find additional information on the effects of the package class
-at these two Yocto Project mailing list links:
-
--  :yocto_lists:`/pipermail/poky/2011-May/006362.html`
-
--  :yocto_lists:`/pipermail/poky/2011-May/006363.html`
+at this Yocto Project mailing list link:
+:yocto_lists:`/g/poky/topic/61292484#msg6286`
 
 .. _ref-classes-package_deb:
 

-- 
2.54.0