Bump Microsoft.Build.Locator from 1.6.10 to 1.7.8

Bumps [Microsoft.Build.Locator](https://github.com/microsoft/MSBuildLocator) from 1.6.10 to 1.7.8.
- [Release notes](https://github.com/microsoft/MSBuildLocator/releases)
- [Commits](microsoft/MSBuildLocator@v1.6.10...v1.7.8)

---
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>

Directory.Packages.props

@@ -12,7 +12,7 @@
         <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Analyzer.Testing.XUnit" Version="1.1.1" />
         <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
         <PackageVersion Include="Microsoft.Build" Version="17.7.2" />
-        <PackageVersion Include="Microsoft.Build.Locator" Version="1.6.10" />
+        <PackageVersion Include="Microsoft.Build.Locator" Version="1.7.8" />
         <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageVersion Include="xunit" Version="2.7.0" />
         <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.7" />