*: fix license

[HunDunDM]

What problem does this PR solve?

Fix wrong license header.

What is changed and how it works?

Find & Replace.

Check List

Tests

• No code

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• disksing

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[disksing]

/merge

[ti-chi-bot]

@disksing: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

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

Commit hash: 434a3eb

[codecov]

Codecov Report

Merging #4056 (434a3eb) into master (fd3fc28) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4056      +/-   ##
==========================================
- Coverage   74.59%   74.53%   -0.06%     
==========================================
  Files         257      257              
  Lines       25980    25980              
==========================================
- Hits        19379    19364      -15     
- Misses       4874     4886      +12     
- Partials     1727     1730       +3     

Flag	Coverage Δ
unittests	74.53% <ø> (-0.06%)	⬇️

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

Impacted Files	Coverage Δ
pkg/assertutil/assertutil.go	100.00% <ø> (ø)
pkg/encryption/crypter.go	57.28% <ø> (ø)
pkg/encryption/master_key.go	82.92% <ø> (ø)
pkg/encryption/region_crypter.go	67.92% <ø> (ø)
server/api/hot_status.go	61.90% <ø> (ø)
server/api/region_label.go	28.91% <ø> (ø)
server/api/version.go	100.00% <ø> (ø)
server/cluster/cluster_stat.go	78.48% <ø> (ø)
server/cluster/coordinator.go	73.64% <ø> (ø)
server/cluster/store_limiter.go	51.06% <ø> (ø)
... and 19 more

---

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