Merge pull request #269 from SciML/compathelper/new_version/2025-01-13-00-18-00-520-03986787410

CompatHelper: add new compat entry for SymbolicIndexingInterface at version 0.3 for package docs, (keep existing compat)

Author: ChrisRackauckas

docs/Project.toml

@@ -105,6 +105,7 @@ StableRNGs = "1"
 StaticArrays = "1"
 Statistics = "1"
 StatsPlots = "0.15"
+SymbolicIndexingInterface = "0.3"
 Symbolics = "6"
 Unitful = "1"
 Zygote = "0.6, 0.7"