Bump Microsoft.Build.Locator from 1.4.1 to 1.5.5 (#1613)

Bumps [Microsoft.Build.Locator](https://github.com/microsoft/MSBuildLocator) from 1.4.1 to 1.5.5.
- [Release notes](https://github.com/microsoft/MSBuildLocator/releases)
- [Commits](https://github.com/microsoft/MSBuildLocator/commits)

---
updated-dependencies:
- dependency-name: Microsoft.Build.Locator
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Directory.Packages.props

@@ -23,7 +23,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Core" Version="2.2.5" />
     <PackageVersion Include="Microsoft.Bcl.AsyncInterfaces" Version="6.0.0" />
     <PackageVersion Include="Microsoft.Build.Framework" Version="16.5.0" ExcludeAssets="runtime" />
-    <PackageVersion Include="Microsoft.Build.Locator" Version="1.4.1" />
+    <PackageVersion Include="Microsoft.Build.Locator" Version="1.5.5" />
     <PackageVersion Include="Microsoft.Build.Utilities.Core" Version="16.5.0" />
     <PackageVersion Include="Microsoft.Build" Version="16.5.0" ExcludeAssets="runtime" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" version="3.3.3" />