Bump Azure.Identity from 1.19.0 to 1.20.0

---
updated-dependencies:
- dependency-name: Azure.Identity
  dependency-version: 1.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/DeltaQuery.csproj

@@ -14,7 +14,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Identity" Version="1.19.0" />
+    <PackageReference Include="Azure.Identity" Version="1.20.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.4" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0" />
     <PackageReference Include="Microsoft.Graph" Version="5.103.0" />