[backend] Fix on count in atomic testing search

[Dimfacion]

Proposed changes

• Small change to fix the count in atomic testing

Related issues

• issue #1167

Checklist

• [x] I consider the submitted work as finished
• [x] I tested the code for its functionality
• [ ] I wrote test cases for the relevant uses case
• [ ] I added/update the relevant documentation (either on github or on notion)
• [ ] Where necessary I refactored code to improve the overall quality

Further comments

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 26.17%. Comparing base (bb9aeb6) to head (b7843d9).

Files	Patch %	Lines
.../java/io/openbas/service/AtomicTestingService.java	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1168 +/- ## ============================================ + Coverage 25.90% 26.17% +0.27% - Complexity 1062 1066 +4 ============================================ Files 481 481 Lines 11602 11602 Branches 609 609 ============================================ + Hits 3005 3037 +32 + Misses 8512 8480 -32 Partials 85 85 ```

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