fix(types): responseHeaders typo in type

[vickvu]

This relates to...

N/A

Rationale

The name of the field should be responseHeaders

Changes

Change the field name to responseHeaders

Features

N/A

Bug Fixes

N/A

Breaking Changes and Deprecations

N/A

Status

• [x] I have read and agreed to the Developer's Certificate of Origin
• [ ] Tested
• [ ] Benchmarked (optional)
• [ ] Documented
• [ ] Review ready
• [ ] In review
• [ ] Merge ready

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (e39a632) 85.54% compared to head (4601498) 85.43%. Report is 35 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2317      +/-   ##
==========================================
- Coverage   85.54%   85.43%   -0.12%     
==========================================
  Files          76       76              
  Lines        6858     6866       +8     
==========================================
- Hits         5867     5866       -1     
- Misses        991     1000       +9     

Files	Coverage Δ
index-fetch.js	100.00% <100.00%> (ø)
lib/core/connect.js	80.00% <100.00%> (-1.25%)	:arrow_down:
lib/fetch/body.js	97.67% <100.00%> (-0.02%)	:arrow_down:
lib/fetch/global.js	100.00% <ø> (ø)
lib/fetch/index.js	85.20% <100.00%> (ø)
lib/pool.js	100.00% <100.00%> (ø)
lib/websocket/connection.js	89.15% <100.00%> (+0.13%)	:arrow_up:
lib/websocket/frame.js	100.00% <100.00%> (ø)
lib/client.js	93.07% <92.30%> (-0.05%)	:arrow_down:
lib/core/util.js	92.63% <85.71%> (-3.16%)	:arrow_down:

... and 1 file with indirect coverage changes

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[kibertoad]

@vickvu Do you need help with this?

[tsctx]

Fixed by #3375