readme: update Go version, wording

[Oreoxmt]

Signed-off-by: Aolin aolin.zhang@pingcap.com

What problem does this PR solve?

Issue Number: Close #5776

What is changed and how does it work?

* update the Go version to v1.19
* update some old links to the latest one
* update some wording, format, and the output of command

Check List

Tests

• No code

Related changes

• PR to update pingcap/docs/pingcap/docs-cn: update go to v1.19 pingcap/docs-cn#12280

Release note

None

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[REVIEW NOTIFICATION]

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• rleungx

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[Oreoxmt]

/cc @nolouch @lilin90

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[lilin90]

LGTM

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[rleungx]

/merge

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: dc66545

[codecov]

Codecov Report

Base: 75.65% // Head: 75.65% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (dc66545) compared to base (65abc36).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5777   +/-   ##
=======================================
  Coverage   75.65%   75.65%           
=======================================
  Files         329      329           
  Lines       32961    32961           
=======================================
+ Hits        24936    24937    +1     
+ Misses       5883     5877    -6     
- Partials     2142     2147    +5     

Flag	Coverage Δ
unittests	75.65% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/errs/errs.go	75.00% <0.00%> (-25.00%)	⬇️
pkg/utils/tempurl/tempurl.go	45.00% <0.00%> (-15.00%)	⬇️
server/id/id.go	83.05% <0.00%> (-6.78%)	⬇️
server/schedulers/random_merge.go	62.50% <0.00%> (-3.13%)	⬇️
pkg/encryption/key_manager.go	70.11% <0.00%> (-1.60%)	⬇️
server/member/member.go	62.10% <0.00%> (-1.58%)	⬇️
server/region_syncer/client.go	85.07% <0.00%> (-1.50%)	⬇️
tools/pd-ctl/pdctl/command/operator.go	66.66% <0.00%> (-1.15%)	⬇️
server/tso/tso.go	69.66% <0.00%> (-1.13%)	⬇️
server/server.go	74.53% <0.00%> (-0.75%)	⬇️
... and 17 more

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