playground: fix cannot find nightly version

[nexustar]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

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• AstroProfundis

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[codecov-commenter]

Codecov Report

Merging #1715 (3bc7008) into master (f7a536b) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1715      +/-   ##
==========================================
- Coverage   53.29%   53.19%   -0.10%     
==========================================
  Files         303      303              
  Lines       34261    34267       +6     
==========================================
- Hits        18256    18226      -30     
- Misses      13864    13897      +33     
- Partials     2141     2144       +3     

Flag	Coverage Δ
cluster	41.38% <0.00%> (-0.11%)	⬇️
dm	24.82% <0.00%> (-0.05%)	⬇️
playground	12.72% <0.00%> (-<0.01%)	⬇️
tiup	14.57% <0.00%> (-<0.01%)	⬇️
unittest	21.34% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/repository/v1_repository.go	58.54% <0.00%> (-0.56%)	⬇️
pkg/utils/retry.go	46.43% <0.00%> (-16.07%)	⬇️
pkg/cluster/api/pdapi.go	58.94% <0.00%> (-2.12%)	⬇️
pkg/cluster/api/dmapi.go	59.88% <0.00%> (-1.74%)	⬇️
pkg/cluster/spec/tikv.go	61.31% <0.00%> (-1.31%)	⬇️
pkg/cluster/spec/tiflash.go	68.51% <0.00%> (-0.67%)	⬇️
pkg/cluster/task/update_meta.go	87.10% <0.00%> (+2.15%)	⬆️

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[AstroProfundis]

We should also add a note on the "starting component" outputs to let users know which version of the component is actually running (as they may not with strictly the same version anymore)

[nexustar]

We should also add a note on the "starting component" outputs to let users know which version of the component is actually running (as they may not with strictly the same version anymore)

this fix is for v1.8.x, I will prepare another PR for that

[srstack]

LGTM

[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 3bc7008