expression: corrected UNSINGED to UNSIGNED

[kolbe]

What problem does this PR solve?

Issue Number: n/a

Problem Summary: typo in error message

What is changed and how it works?

Simply change "UNSINGED" to "UNSIGNED" in a single error message.

Check List

Tests

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

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

None.

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

Corrected a typo in an error message from "UNSINGED" to "UNSIGNED".

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• hawkingrei
• ngaut

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[hawkingrei]

/merge

[ti-chi-bot]

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

Commit hash: 84b5336

[sre-bot]

TiDB MergeCI notify

✅ Well Done! New fixed [1] after this pr merged.

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/integration-common-test	🔴 failed 2, success 15, total 17	8 min 52 sec	Existing failure
idc-jenkins-ci-tidb/tics-test	🔴 failed 1, success 0, total 1	4 min 12 sec	Existing failure
idc-jenkins-ci-tidb/integration-ddl-test	✅ all 6 tests passed	30 min	Fixed
idc-jenkins-ci/integration-cdc-test	🟢 all 37 tests passed	25 min	Existing passed
idc-jenkins-ci-tidb/common-test	🟢 all 11 tests passed	10 min	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	4 min 42 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	4 min 35 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	3 min 4 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	2 min 55 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed