Fix dependabot issues

[oliveromahony]

Proposed changes

Upgrade version of golang.org/x/net

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

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[codecov-commenter]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (6069efc) 66.10% compared to head (c9f71c1) 66.09%.
Report is 3 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #503      +/-   ##
==========================================
- Coverage   66.10%   66.09%   -0.01%     
==========================================
  Files         118      118              
  Lines       13446    13454       +8     
==========================================
+ Hits         8889     8893       +4     
- Misses       3962     3966       +4     
  Partials      595      595              

Files	Coverage Δ
src/core/config/config.go	69.27% <100.00%> (+0.24%)	⬆️
src/core/config/defaults.go	0.00% <ø> (ø)
src/core/config/types.go	0.00% <ø> (ø)
...nx/agent/v2/src/core/metrics/sources/nginx_plus.go	70.46% <ø> (-0.12%)	⬇️
...or/github.com/nginx/agent/v2/src/plugins/common.go	70.93% <100.00%> (ø)
src/core/pipe.go	54.09% <66.66%> (ø)
...ithub.com/nginx/agent/v2/src/plugins/extensions.go	51.35% <66.66%> (ø)
.../github.com/nginx/agent/v2/src/plugins/features.go	36.79% <50.00%> (ø)
....com/nginx/agent/v2/src/plugins/process_watcher.go	81.18% <22.22%> (-5.91%)	⬇️

... and 2 files with indirect coverage changes

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