CompatHelper: bump compat for DynamicPPL to 0.28 for package turing, (keep existing compat) (#623)

Co-authored-by: CompatHelper Julia <compathelper_noreply@julialang.org>

Author: github-actions[bot]

test/turing/Project.toml

@@ -10,7 +10,7 @@ Turing = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
 
 [compat]
 Distributions = "0.25"
-DynamicPPL = "0.24, 0.25, 0.26, 0.27"
+DynamicPPL = "0.24, 0.25, 0.26, 0.27, 0.28"
 MCMCChains = "6"
 ReverseDiff = "1.15"
 Turing = "0.33"