fix: src/TestSite.14/TestSite.14.csproj to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DOTNET-UMBRACOCMSCORE-9674185
- https://snyk.io/vuln/SNYK-DOTNET-UMBRACOCMSAPIMANAGEMENT-9674186

Author: snyk-bot

src/TestSite.14/TestSite.14.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Umbraco.Cms" Version="14.3.3"/>
+        <PackageReference Include="Umbraco.Cms" Version="14.3.4"/>
         <PackageReference Include="uSync" Version="14.2.2"/>
     </ItemGroup>