docs: align JSDoc with signature and fix EOF newline

[DCchoudhury15]

Changes

• Aligned JSDoc parameters with the actual (context, body) function signature in the Node.js HTTP template to resolve confusion.
• Added the missing @returns tag to the JSDoc to improve IDE autocomplete and documentation for function output.
• Fixed a missing EOF (End Of File) newline in templates/node/http/index.js to comply with project linting standards.
• Regenerated the embedded filesystem in generate/zz_filesystem_generated.go to ensure the template changes are included in the func binary.

/kind cleanup

Fixes #3032

Release Note

Fixed JSDoc and function signature mismatch in the Node.js HTTP template. The documentation now correctly reflects that 'body' is passed as a separate second argument.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: DCchoudhury15 / name: Divyanshu Choudhury (6f7d6b6)

[knative-prow]

Welcome @DCchoudhury15! It looks like this is your first PR to knative/func 🎉

[knative-prow]

Hi @DCchoudhury15. Thanks for your PR.

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[intojhanurag]

/ok-to-test

[DCchoudhury15]

@intojhanurag up for review.

[matejvasek]

/approve
/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: DCchoudhury15, matejvasek

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.03%. Comparing base (392c49e) to head (6f7d6b6).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3336      +/-   ##
==========================================
- Coverage   55.10%   55.03%   -0.07%     
==========================================
  Files         170      170              
  Lines       19850    19850              
==========================================
- Hits        10938    10925      -13     
- Misses       7845     7855      +10     
- Partials     1067     1070       +3     

Flag	Coverage Δ
e2e	39.59% <ø> (ø)
e2e go	35.62% <ø> (ø)
e2e node	31.13% <ø> (ø)
e2e python	35.25% <ø> (-0.10%)	⬇️
e2e quarkus	31.28% <ø> (ø)
e2e rust	30.72% <ø> (-0.01%)	⬇️
e2e springboot	30.77% <ø> (ø)
e2e typescript	31.25% <ø> (ø)
integration	17.51% <ø> (-0.03%)	⬇️
unit macos-14	44.96% <ø> (ø)
unit macos-latest	44.96% <ø> (ø)
unit ubuntu-24.04-arm	45.07% <ø> (ø)
unit ubuntu-latest	45.86% <ø> (ø)
unit windows-latest	44.98% <ø> (ø)

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