Bump the backend-dependencies group with 1 update (#69)

Bumps MongoDB.Driver from 3.11.0 to 3.11.1

---
updated-dependencies:
- dependency-name: MongoDB.Driver
  dependency-version: 3.11.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: backend-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Backend/SaltTask.fsproj

@@ -17,7 +17,7 @@
 
   <ItemGroup>
     <PackageReference Include="Giraffe" Version="8.3.0" />
-    <PackageReference Include="MongoDB.Driver" Version="3.11.0" />
+    <PackageReference Include="MongoDB.Driver" Version="3.11.1" />
   </ItemGroup>
 
 </Project>