turris-diagnostics: fix invalid ss command

The ss command on Turris OS 5.x does not support the --cgroup argument. It is available only since Turris OS 6.0.0.

Fixes: turris/diagnostics#32 (closed)

We should merge this to HBL with strategy ours so it is included only in HBK.

utils/turris-diagnostics/patches/0001-sockets-missing-cgroup.patch

+diff --git a/modules/48_sockets.module b/modules/48_sockets.module
+index 26e8f4a..25035bd 100755
+--- a/modules/48_sockets.module
++++ b/modules/48_sockets.module
+@@ -5,7 +5,7 @@ $(gettext "Prints sockets info about all sockets.")
+ "
+ 
+ run() {
+-	ss --all --extended --processes --cgroup
++	ss --all --extended --processes
+ }
+ 
+ # vim: ft=sh