Fix mergeDiktatReports

[nulls]

What's done:

• mustRunAfter instead of dependsOn to allow run mergeDiktatReports after failing diktatCheck

It closes #1733

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (15d2ad4) 78.39% compared to head (9d13204) 78.39%.

Files	Patch %	Lines
...diktat/plugin/gradle/tasks/SarifReportMergeTask.kt	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1812 +/- ## ========================================= Coverage 78.39% 78.39% Complexity 2432 2432 ========================================= Files 128 128 Lines 8578 8578 Branches 2151 2151 ========================================= Hits 6725 6725 Misses 893 893 Partials 960 960 ```

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[github-actions[bot]]

JUnit Tests (macOS, EnricoMi/publish-unit-test-result-action@v2)

   164 files  ±0     164 suites  ±0   5m 9s :stopwatch: -33s 1 393 tests ±0  1 357 :heavy_check_mark: ±0  36 :zzz: ±0  0 :x: ±0  2 772 runs  ±0  2 736 :heavy_check_mark: ±0  36 :zzz: ±0  0 :x: ±0 

Results for commit 9d132042. ± Comparison against base commit 15d2ad49.

[github-actions[bot]]

JUnit Tests (Windows, EnricoMi/publish-unit-test-result-action@v2)

   164 files  ±0     164 suites  ±0   6m 48s :stopwatch: -3s 1 393 tests ±0  1 376 :heavy_check_mark: ±0  17 :zzz: ±0  0 :x: ±0  2 772 runs  ±0  2 755 :heavy_check_mark: ±0  17 :zzz: ±0  0 :x: ±0 

Results for commit 9d132042. ± Comparison against base commit 15d2ad49.