Bump Microsoft.OpenApi from 1.6.14 to 1.6.15

Bumps [Microsoft.OpenApi](https://github.com/Microsoft/OpenAPI.NET) from 1.6.14 to 1.6.15.
- [Release notes](https://github.com/Microsoft/OpenAPI.NET/releases)
- [Commits](microsoft/OpenAPI.NET@1.6.14...1.6.15)

---
updated-dependencies:
- dependency-name: Microsoft.OpenApi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj

@@ -42,7 +42,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.OData.Edm" Version="7.21.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.6.14" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.6.15" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

src/OoasGui/OoasGui.csproj

@@ -17,7 +17,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.OData.Edm" Version="7.21.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.6.14" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.6.15" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
   </ItemGroup>
 </Project>

test/Microsoft.OpenAPI.OData.Reader.Tests/Microsoft.OpenAPI.OData.Reader.Tests.csproj

@@ -73,7 +73,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.6.14" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.6.15" />
     <PackageReference Include="xunit" Version="2.8.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
       <PrivateAssets>all</PrivateAssets>

tool/UpdateDocs/UpdateDocs.csproj

@@ -13,6 +13,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.OData.Edm" Version="7.21.3" />
-    <PackageReference Include="Microsoft.OpenApi" Version="1.6.14" />
+    <PackageReference Include="Microsoft.OpenApi" Version="1.6.15" />
   </ItemGroup>
 </Project>