CompatHelper: bump compat for DataInterpolations to 8, (keep existing compat) (#50)

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

Author: github-actions[bot]

Project.toml

@@ -34,7 +34,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 [compat]
 ArviZExampleData = "0.1.5"
 Compat = "4.2.0"
-DataInterpolations = "4, 5, 6, 7"
+DataInterpolations = "4, 5, 6, 7, 8"
 Distributions = "0.25.57"
 DocStringExtensions = "0.8, 0.9"
 FFTW = "1.6.0"