Bump Oracle.ManagedDataAccess.Core to 23.26.0 (#508)

Author: renovate[bot]

tests/Repositories.Oracle.Tests/Repositories.Oracle.Tests.csproj

@@ -5,7 +5,7 @@
     <CoverletOutputFormat>opencover</CoverletOutputFormat>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Oracle.ManagedDataAccess.Core" Version="23.9.1" />
+    <PackageReference Include="Oracle.ManagedDataAccess.Core" Version="23.26.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageReference Include="xunit.v3" Version="3.1.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">