chore(deps): Bump the nuget-agent group with 1 update (#3663)

Bumps Microsoft.VisualStudio.Threading.Analyzers from 17.14.15 to 18.7.23

---
updated-dependencies:
- dependency-name: Microsoft.VisualStudio.Threading.Analyzers
  dependency-version: 18.7.23
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: nuget-agent
...

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

Author: dependabot[bot]

src/Agent/NewRelic.Api.Agent/NewRelic.Api.Agent.csproj

@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.14.15">
+    <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="18.7.23">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>