CompatHelper: add new compat entry for Combinatorics at version 1 for package test, (keep existing compat) (#2448)

Co-authored-by: CompatHelper Julia <[email protected]>

Author: github-actions[bot]

test/Project.toml

@@ -47,6 +47,7 @@ AdvancedVI = "0.2"
 Aqua = "0.8"
 BangBang = "0.4"
 Clustering = "0.14, 0.15"
+Combinatorics = "1"
 Distributions = "0.25"
 DistributionsAD = "0.6.3"
 DynamicHMC = "2.1.6, 3.0"