Update sl container for sl6 to current (build-date=20200901)
@@ -14,4 +14,4 @@ Tags: 6
Architectures: amd64
GitFetch: refs/heads/6
Directory: sl6
-GitCommit: c6fc7dd5194d0a46d9c26f46904bb0ba6187e0e0
+GitCommit: 4885aa4bfcf2d5e7ec9f27f660a71376b51d84ba