usepackagetargets updates to #r nuget syntax (#45467)

* usepackagetargets  updates to #r nuget syntax

* Update index.md

* Add usepackagetargets option example in docs

* Fix formatting in F# Interactive documentation

* Apply suggestions from code review

Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com>

---------

Co-authored-by: Bill Wagner <wiwagn@microsoft.com>
Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com>

Author: 3 people

docs/fsharp/tools/fsharp-interactive/index.md

@@ -158,6 +158,16 @@ let f (x: Tensor) = sin (sqrt x)
 printfn $"{f (dsharp.tensor 1.2)}"
 ```
 
+By default, ````#r "nuget: ...."```` doesn't use build targets from the package being referenced during restore. The `usepackagetargets` option enables the use of these build targets when required. Only add `usepackagetargets=true` if the referenced package was authored to require it during restore.
+Examples:
+
+```fsharp
+// load fsharp.data nugetpackage and consume buildtargets from fsharp.data package during restore.
+#r "nuget:fsharp.data,usepackagetargets=true"
+#r "nuget:fsharp.data,6.6.0,usepackagetargets=false"
+#r "nuget:fsharp.data,6.6.0,usepackagetargets=true"
+```
+
 ### Specifying a package source
 
 You can also specify a package source with the `#i` command. The following example specifies a remote and a local source: