Merge pull request #8968 from scientificlinux/sl7

Update sl container for sl7 to current (build-date=20201027)

library/sl

@@ -7,7 +7,7 @@ Tags: 7, latest
 Architectures: amd64
 GitFetch: refs/heads/7
 Directory: sl7
-GitCommit: 3202da426d5920a3cee8db8da18f552d9a044551
+GitCommit: a241e31e58819742a5b89360e3e44492773804aa
 
 # For the SL6 container
 Tags: 6