fix: ShareBook/ShareBook.Service/ShareBook.Service.csproj to reduce v…

…ulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DOTNET-NEWTONSOFTJSON-2774678

ShareBook/ShareBook.Service/ShareBook.Service.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="AWSSDK.SQS" Version="3.5.1.10" />
-    <PackageReference Include="Flurl.Http" Version="3.0.1" />
+    <PackageReference Include="Flurl.Http" Version="4.0.0" />
     <PackageReference Include="MailKit" Version="2.15.0" />
     <PackageReference Include="OneSignal.RestAPIv3.Client" Version="1.2.0" />
     <PackageReference Include="Rollbar" Version="4.0.3" />