fix(deps): update module golang.org/x/net to v0.21.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
golang.org/x/net	v0.20.0 -> v0.21.0

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Configuration

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (0de22d5) 50.60% compared to head (d1cd274) 50.70%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #129 +/- ## ========================================== + Coverage 50.60% 50.70% +0.09% ========================================== Files 67 67 Lines 3140 3140 ========================================== + Hits 1589 1592 +3 + Misses 1336 1334 -2 + Partials 215 214 -1 ```

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