chore: Update .NET SDK dependencies to v4.0.0-preview.8

Author: philasmar

.autover/changes/ee36c4fd-aecb-4b23-91c1-c1c1ca49d3d0.json

@@ -0,0 +1,11 @@
+{
+  "Projects": [
+    {
+      "Name": "Amazon.AspNetCore.Identity.Cognito",
+      "Type": "Patch",
+      "ChangelogMessages": [
+        "Update .NET SDK dependencies to v4.0.0-preview.8"
+      ]
+    }
+  ]
+}

src/Amazon.AspNetCore.Identity.Cognito/Amazon.AspNetCore.Identity.Cognito.csproj

@@ -39,10 +39,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Amazon.Extensions.CognitoAuthentication" Version="3.0.0-preview.1" />
-    <PackageReference Include="AWSSDK.CognitoIdentity" Version="4.0.0-preview.4" />
-    <PackageReference Include="AWSSDK.CognitoIdentityProvider" Version="4.0.0-preview.4" />
-    <PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="4.0.0-preview.4" />
+    <PackageReference Include="Amazon.Extensions.CognitoAuthentication" Version="3.0.0-preview.2" />
+    <PackageReference Include="AWSSDK.CognitoIdentity" Version="4.0.0-preview.8" />
+    <PackageReference Include="AWSSDK.CognitoIdentityProvider" Version="4.0.0-preview.8" />
+    <PackageReference Include="AWSSDK.Extensions.NETCore.Setup" Version="4.0.0-preview.8" />
     <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>