[dependabot]: Bump Cottle from 2.0.10 to 2.1.0

---
updated-dependencies:
- dependency-name: Cottle
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/ImageBuilder/Microsoft.DotNet.ImageBuilder.csproj

@@ -18,7 +18,7 @@
     <PackageReference Include="Azure.Containers.ContainerRegistry" Version="1.3.0" />
     <PackageReference Include="Azure.Identity" Version="1.13.2" />
     <PackageReference Include="Azure.ResourceManager.ContainerRegistry" Version="1.4.0" />
-    <PackageReference Include="Cottle" Version="2.0.10" />
+    <PackageReference Include="Cottle" Version="2.1.0" />
     <PackageReference Include="LibGit2Sharp" Version="0.30.0" />
     <PackageReference Include="Microsoft.Azure.Kusto.Ingest" Version="14.0.3" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.11" />