Bump Gremlin.Net from 3.6.2 to 3.6.4

Bumps [Gremlin.Net](https://github.com/apache/tinkerpop) from 3.6.2 to 3.6.4.
- [Changelog](https://github.com/apache/tinkerpop/blob/master/CHANGELOG.asciidoc)
- [Commits](apache/tinkerpop@3.6.2...3.6.4)

---
updated-dependencies:
- dependency-name: Gremlin.Net
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/HealthChecks.Gremlin/HealthChecks.Gremlin.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Gremlin.Net" Version="3.6.2" />
+    <PackageReference Include="Gremlin.Net" Version="3.6.4" />
     <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="7.0.3" />
   </ItemGroup>