chore: bump kcl version to v0.9.0-alpha.2

[Peefy]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

• chore: bump kcl version to v0.9.0-alpha.2

[coveralls]

Pull Request Test Coverage Report for Build 9112657809

Details

• 12 of 12 (100.0%) changed or added relevant lines in 3 files are covered.
• 9 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.007%) to 71.061%

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Files with Coverage Reduction	New Missed Lines	%
kclvm/sema/src/core/scope.rs	3	65.58%
kclvm/query/src/query.rs	3	68.48%
kclvm/sema/src/core/symbol.rs	3	46.99%

Totals
Change from base Build 9112025674:	0.007%
Covered Lines:	53658
Relevant Lines:	75510

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💛 - Coveralls