Bump the thisassembly group with 1 update

Bumps the thisassembly group with 1 update: [ThisAssembly.Strings](https://github.com/devlooped/ThisAssembly).


Updates `ThisAssembly.Strings` from 1.4.1 to 1.4.3
- [Release notes](https://github.com/devlooped/ThisAssembly/releases)
- [Changelog](https://github.com/devlooped/ThisAssembly/blob/main/changelog.md)
- [Commits](devlooped/ThisAssembly@v1.4.1...v1.4.3)

---
updated-dependencies:
- dependency-name: ThisAssembly.Strings
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: thisassembly
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Epub/Epub.csproj

@@ -12,7 +12,7 @@
     <PackageReference Include="ISBN" Version="1.4.0" />
     <PackageReference Include="NuGetizer" Version="1.2.1" />
     <PackageReference Include="PolySharp" Version="1.14.1" PrivateAssets="all" />
-    <PackageReference Include="ThisAssembly.Strings" Version="1.4.1" PrivateAssets="all" />
+    <PackageReference Include="ThisAssembly.Strings" Version="1.4.3" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>