fix: license header

[v0y4g3r]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Fix indent and year issue in license header.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

Refer to a related PR or issue link (optional)

fix #814

[waynexia]

Let's be tedious for this time 🤪

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@179ff72). Click here to learn what that means.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             develop     #815   +/-   ##
==========================================
  Coverage           ?   85.26%           
==========================================
  Files              ?      416           
  Lines              ?    54321           
  Branches           ?        0           
==========================================
  Hits               ?    46315           
  Misses             ?     8006           
  Partials           ?        0           

Flag	Coverage Δ
rust	85.26% <100.00%> (?)

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

Impacted Files	Coverage Δ
src/api/src/error.rs	7.14% <ø> (ø)
src/api/src/helper.rs	91.01% <ø> (ø)
src/api/src/result.rs	100.00% <ø> (ø)
src/api/src/serde.rs	100.00% <ø> (ø)
src/api/src/v1/column_def.rs	100.00% <ø> (ø)
src/api/src/v1/meta.rs	78.81% <ø> (ø)
src/catalog/src/error.rs	82.60% <ø> (ø)
src/catalog/src/helper.rs	85.92% <ø> (ø)
src/catalog/src/local/manager.rs	63.20% <ø> (ø)
src/catalog/src/local/memory.rs	80.89% <ø> (ø)
... and 248 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[evenyag]

LGTM. I need this to make my PR pass the CI jobs 😄