fix: bump BigBook in /FileCurator in the dependencies group

Bumps the dependencies group in /FileCurator with 1 update: [BigBook](https://github.com/JaCraig/BigBookOfDataTypes).


Updates `BigBook` from 6.0.3 to 6.0.4
- [Changelog](https://github.com/JaCraig/BigBookOfDataTypes/blob/master/CHANGELOG.md)
- [Commits](JaCraig/BigBookOfDataTypes@v6.0.3...v6.0.4)

---
updated-dependencies:
- dependency-name: BigBook
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

FileCurator/FileCurator.csproj

@@ -46,7 +46,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="BigBook" Version="6.0.3" />
+    <PackageReference Include="BigBook" Version="6.0.4" />
     <PackageReference Include="DocumentFormat.OpenXml" Version="3.2.0" />
     <PackageReference Include="HtmlAgilityPack" Version="1.11.72" />
     <PackageReference Include="MimeKit" Version="4.9.0" />