fix epplus version

Author: ildoc

src/Extensions/Extensions.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="EPPlus" Version="4.5.3.3" />
+    <PackageReference Include="EPPlus" Version="[4.5.3.3]" />
     <PackageReference Include="FluentValidation" Version="11.11.0" />
     <PackageReference Include="Microsoft.AspNetCore.Hosting" Version="2.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.3.0" />