chore(deps): update dependency dotenv.net to v4

Author: renovate[bot]

playground/csharp/Playground/Playground.csproj

@@ -14,7 +14,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="dotenv.net" Version="3.2.1"/>
+    <PackageReference Include="dotenv.net" Version="4.0.0"/>
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.7"/>
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.7"/>
   </ItemGroup>

tests/output/csharp/src/Algolia.Search.Tests.csproj

@@ -11,7 +11,7 @@
     <ProjectReference Include="..\..\..\..\clients/algoliasearch-client-csharp\algoliasearch\Algolia.Search.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="dotenv.net" Version="3.2.1" />
+    <PackageReference Include="dotenv.net" Version="4.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="Moq" Version="4.20.72" />
     <PackageReference Include="Quibble.Xunit" Version="0.3.1" />