Remove reference to 4.2.0 in the compatibility page.

This was in the metadata and was likely not visible to anyone,
but for consistency its better to match the current version.

Author: Jonathan S. Katz

hugo/content/Configuration/compatibility.md

@@ -1,7 +1,7 @@
 
 ---
 title: "Compatibility Requirements"
-Latest Release: 4.2.0 {docdate}
+Latest Release: 4.1.1 {docdate}
 draft: false
 weight: 1
 ---