[C#] bump: Bump the development group with 2 updates (#2559)

#minor 
Updated [Azure.Identity](https://github.com/Azure/azure-sdk-for-net)
from 1.14.2 to 1.15.0.

<details>
<summary>Release notes</summary>

_Sourced from [Azure.Identity's
releases](https://github.com/Azure/azure-sdk-for-net/releases)._

No release notes found for this version range.

Commits viewable in [compare
view](https://github.com/Azure/azure-sdk-for-net/commits).
</details>

Updated
[Microsoft.Identity.Client](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet)
from 4.74.1 to 4.76.0.

<details>
<summary>Release notes</summary>

_Sourced from [Microsoft.Identity.Client's
releases](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/releases)._

## 4.76.0

## What's Changed
* Removal of `ExperimentalFeatures` flag on `WithMtlsProofOfPossession`
API: by @​gladjohn in
AzureAD/microsoft-authentication-library-for-dotnet#5402
* #​5400 Fixing issue that leads to multiple active access tokens in the
cache for non-tenanted oidc authority by @​andkorsh in
AzureAD/microsoft-authentication-library-for-dotnet#5401
* Add Service Fabric token revocation support by @​gladjohn in
AzureAD/microsoft-authentication-library-for-dotnet#5421
* Update NativeInterop package version to 0.19.4 by @​ashok672 in
AzureAD/microsoft-authentication-library-for-dotnet#5434
* Adding WithExtraBodyParameters api by @​trwalke in
AzureAD/microsoft-authentication-library-for-dotnet#5389
* Enable mTLS Proof‑of‑Possession for Client‑Assertion Delegates by
@​gladjohn in
AzureAD/microsoft-authentication-library-for-dotnet#5409

## New Contributors
* @​andkorsh made their first contribution in
AzureAD/microsoft-authentication-library-for-dotnet#5401

**Full Changelog**:
AzureAD/microsoft-authentication-library-for-dotnet@4.74.1...4.76.0

Commits viewable in [compare
view](AzureAD/microsoft-authentication-library-for-dotnet@4.74.1...4.76.0).
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dotnet/packages/Microsoft.TeamsAI/Microsoft.TeamsAI.Tests/Microsoft.Teams.AI.Tests.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.AI.OpenAI" Version="2.1.0-beta.1" />
-    <PackageReference Include="Azure.Identity" Version="1.14.2" />
+    <PackageReference Include="Azure.Identity" Version="1.15.0" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
     <PackageReference Include="Microsoft.Bot.Builder" Version="4.23.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />

dotnet/packages/Microsoft.TeamsAI/Microsoft.TeamsAI/Microsoft.Teams.AI.csproj

@@ -48,7 +48,7 @@
     <PackageReference Include="Microsoft.Bot.Builder" Version="4.23.0" />
     <PackageReference Include="Microsoft.Bot.Builder.Dialogs" Version="4.23.0" />
     <PackageReference Include="Microsoft.Bot.Builder.Integration.AspNet.Core" Version="4.23.0" />
-    <PackageReference Include="Microsoft.Identity.Client" Version="4.74.1" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.76.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Microsoft.ML.Tokenizers.Data.Cl100kBase" Version="1.0.2" /> <!-- This package is required to support gpt-3.x and gpt-4 models -->
     <PackageReference Include="Microsoft.ML.Tokenizers.Data.O200kBase" Version="1.0.2" />  <!-- This package is required to support gpt-4o models -->