CompatHelper: add new compat entry for IJulia at version 1 for packag…

…e docs, (keep existing compat) (#908)

This pull request sets the compat entry for the `IJulia` package to `1`
for package docs.
This keeps the compat entries for earlier versions.



Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass
before you merge this pull request.
Note: Consider registering a new release of your package immediately
after merging this PR, as downstream packages may depend on this for
tests to pass.

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

docs/Project.toml

@@ -26,6 +26,7 @@ DataFrames = "1"
 Dates = "<0.0.1,1"
 Documenter = "0.27,1"
 DocumenterMarkdown = "0.2"
+IJulia = "1"
 InteractiveUtils = "<0.0.1,1"
 JSON3 = "1.12"
 Legolas = "0.5"