Revert "CompatHelper: bump compat for PrettyTables to 3, (keep existing compa…" (#2892)

This reverts commit 20c135c.

Author: maleadt

Project.toml

@@ -76,7 +76,7 @@ LinearAlgebra = "1"
 Logging = "1"
 NVTX = "1"
 Preferences = "1"
-PrettyTables = "2, 3"
+PrettyTables = "2"
 Printf = "1"
 Random = "1"
 Random123 = "1.2"