fix: return type of sendTransaction in docs

[krzysu]

Fix return type of sendTransaction in docs. I did pretty much exactly the same as here #7245

Fixes #7185

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run lint with success and extended the tests and types if necessary.
• I ran npm run test:unit with success.
• I ran npm run test:coverage and my test cases cover all the lines and branches of the added code.
• I ran npm run build and tested dist/web3.min.js in a browser.
• I have tested my code on the live network.
• I have checked the Deploy Preview and it looks correct.
• I have updated the CHANGELOG.md file in the root folder.
• I have linked Issue(s) with this PR in "Linked Issues" menu.

[github-actions]

Bundle Stats

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Total

Files count	Total bundle size	% Changed
10	649.08 kB	0%

Changeset

File	Δ	Size
../web3-eth/lib/commonjs/web3_eth.js	📈 +3.12 kB (+3.17%)	98.26 kB → 101.38 kB

View detailed bundle breakdown

Added

No assets were added

Removed

No assets were removed

Bigger

No assets were bigger

Smaller

No assets were smaller

Unchanged

Asset	File Size	% Changed
web3.min.js	630.33 kB	0%
../lib/commonjs/index.d.ts	8.72 kB	0%
../lib/commonjs/accounts.d.ts	3.06 kB	0%
../lib/commonjs/types.d.ts	2.73 kB	0%
../lib/commonjs/web3.d.ts	1.38 kB	0%
../lib/commonjs/web3_eip6963.d.ts	1.28 kB	0%
../lib/commonjs/abi.d.ts	1.06 kB	0%
../lib/commonjs/eth.exports.d.ts	280 B	0%
../lib/commonjs/providers.exports.d.ts	183 B	0%
../lib/commonjs/version.d.ts	60 B	0%

[github-actions]

Benchmark

Benchmark suite	Current: ec12fb1	Previous: 0915cf4	Ratio
processingTx	22514 ops/sec (±8.34%)	21158 ops/sec (±9.09%)	0.94
processingContractDeploy	39234 ops/sec (±7.21%)	39840 ops/sec (±7.22%)	1.02
processingContractMethodSend	16236 ops/sec (±6.41%)	16219 ops/sec (±7.11%)	1.00
processingContractMethodCall	27733 ops/sec (±6.47%)	28092 ops/sec (±7.49%)	1.01
abiEncode	42727 ops/sec (±7.77%)	42384 ops/sec (±8.97%)	0.99
abiDecode	28494 ops/sec (±7.82%)	30530 ops/sec (±6.45%)	1.07
sign	1559 ops/sec (±1.17%)	1490 ops/sec (±3.70%)	0.96
verify	360 ops/sec (±3.00%)	364 ops/sec (±0.63%)	1.01

This comment was automatically generated by workflow using github-action-benchmark.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.51%. Comparing base (0915cf4) to head (ec12fb1).
Report is 1 commits behind head on 4.x.

Additional details and impacted files

@@           Coverage Diff           @@
##              4.x    #7386   +/-   ##
=======================================
  Coverage   94.51%   94.51%           
=======================================
  Files         218      218           
  Lines        8557     8557           
  Branches     2363     2363           
=======================================
  Hits         8088     8088           
  Misses        469      469           

Flag	Coverage Δ
UnitTests	94.51% <ø> (ø)

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[danforbes]

Thanks for taking care of this, Kris 🙏🏻 I also went ahead and included the fix for "encorage" vs "encourage" in infer_contract_types.md that was pointed out in #7383