CompatHelper: bump compat for Zygote to 0.7 for package docs, (keep existing compat)

Author: CompatHelper Julia

docs/Project.toml

@@ -66,4 +66,4 @@ StaticArrays = "1"
 Statistics = "1"
 StochasticDiffEq = "6.56"
 Tracker = "0.2"
-Zygote = "0.6"
+Zygote = "0.6, 0.7"