docs(starter-webflux): update feature spring security

[paul58914080]

Description

Closes :

Checklist for self review:

• [x] My code follows the contribution guidelines of this project
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] My commits follow conventional commit message guidelines

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (28f86cb) 88.74% compared to head (d36a119) 88.74%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #373 +/- ## ========================================= Coverage 88.74% 88.74% Complexity 211 211 ========================================= Files 54 54 Lines 542 542 Branches 22 22 ========================================= Hits 481 481 Misses 48 48 Partials 13 13 ```

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