Add callout and to 1.5 highlights

Author: cwickham

docs/computations/julia.qmd

@@ -204,6 +204,8 @@ To enable the cache for a document, add the `cache` option. For example:
 
 ## Using the `julia` engine
 
+{{< include /docs/prerelease/1.5/_pre-release-feature.qmd >}}
+
 ### Installation
 
 The `julia` engine uses the [QuartoNotebookRunner.jl](https://github.com/PumasAI/QuartoNotebookRunner.jl/) package to render notebooks. When you first attempt to render a notebook with the `julia` engine, Quarto will automatically install this package into a private environment that is owned by Quarto. This installation will therefore not interact or conflict with any other Julia environments on your machine. Quarto will use the `julia` binary on your PATH by default, but you can override this using the `QUARTO_JULIA` environment variable.

docs/prerelease/1.5/_highlights.qmd

@@ -2,6 +2,8 @@ Quarto 1.5 includes the following new features:
 
 -   [Website Draft Mode](/docs/prerelease/1.5/website-drafts.qmd)---Improved support for workflows involving draft posts and pages. 
 
+-   [Native Julia Engine](/docs/computations/julia.qmd#using-the-julia-engine)---Execute Julia code in Quarto documents without requiring Jupyter.
+
 -   [Project Pre Render Scripts](/docs/prerelease/1.5/pre-render.qmd)---Project metadata and the render list are now re-computed after any pre-render scripts have executed.
 
 - [Element-wide disabling of HTML processing](/docs/prerelease/1.5/lua-table-processing.qmd)---Additional control for table processing.