build(deps): bump Exceptionless from 4.8.0 to 5.0.0 in /src

Bumps [Exceptionless](https://github.com/exceptionless/Exceptionless.Net) from 4.8.0 to 5.0.0.
- [Release notes](https://github.com/exceptionless/Exceptionless.Net/releases)
- [Commits](exceptionless/Exceptionless.Net@v4.8.0...v5.0.0)

---
updated-dependencies:
- dependency-name: Exceptionless
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/Splat.Exceptionless/Splat.Exceptionless.csproj

@@ -11,7 +11,7 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Exceptionless" Version="4.8.0" />
+    <PackageReference Include="Exceptionless" Version="5.0.0" />
     <PackageReference Include="System.Collections.Immutable" Version="7.0.0" />
   </ItemGroup>