Bump Microsoft.Xaml.Behaviors.Wpf from 1.1.37 to 1.1.39 (#57)

Bumps [Microsoft.Xaml.Behaviors.Wpf](https://github.com/microsoft/XamlBehaviorsWpf) from 1.1.37 to 1.1.39.
- [Release notes](https://github.com/microsoft/XamlBehaviorsWpf/releases)
- [Commits](https://github.com/microsoft/XamlBehaviorsWpf/commits)

---
updated-dependencies:
- dependency-name: Microsoft.Xaml.Behaviors.Wpf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build/Packages.targets

@@ -47,7 +47,7 @@
     <PackageReference Update="coverlet.collector" Version="3.1.0" />
 
     <!-- Demo project -->
-    <PackageReference Update="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.37" />
+    <PackageReference Update="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.39" />
     <PackageReference Update="Nito.Disposables" Version="2.2.1" />
     <PackageReference Update="Nito.Mvvm.Async" Version="1.0.0-pre-04" />
     <PackageReference Update="Nito.Mvvm.CalculatedProperties" Version="1.3.1" />