Bump Microsoft.Agents.AI.OpenAI from 1.0.0-preview.260128.1 to 1.0.0-rc4 (#52525)

* Bump Microsoft.Agents.AI.OpenAI from 1.0.0-preview.260128.1 to 1.0.0-rc4

---
updated-dependencies:
- dependency-name: Microsoft.Agents.AI.OpenAI
  dependency-version: 1.0.0-rc4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

* Use CreateSessionAsync

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com>

Author: dependabot[bot]

docs/ai/snippets/prompt-engineering/multi-turn-chat.cs

@@ -13,7 +13,7 @@
         .AsAIAgent();
 
 // Create a session to maintain conversation state.
-AgentSession session = await agent.GetNewSessionAsync();
+AgentSession session = await agent.CreateSessionAsync();
 
 while (true)
 {

docs/ai/snippets/prompt-engineering/multi-turn-chat.csproj

@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.AI.OpenAI" Version="2.8.0-beta.1" />
-    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-preview.260128.1" />
+    <PackageReference Include="Microsoft.Agents.AI.OpenAI" Version="1.0.0-rc4" />
     <!--
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="10.0.2" />
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="10.0.2" />