[hotfix][docs] Fix temporal table function expression examples

[fallintoplace]

What is the purpose of the change

The Java temporal table function example includes an opening parenthesis in the o_amount column name. The Scala example has an unmatched closing parenthesis. Both errors appear in the English and Chinese documentation.

Brief change log

• Correct the o_amount reference in both Java examples.
• Remove the unmatched closing parenthesis from both Scala examples.

Verifying this change

The English and Chinese documentation build successfully with Hugo.

Does this pull request potentially affect one of the following parts:

• Dependencies: no
• Public API: no
• Serializers: no
• Runtime per-record code paths: no
• Deployment or recovery: no
• S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no

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Was generative AI tooling used to co-author this PR?

• No

[flinkbot]

CI report:

• 81be04a Azure: SUCCESS

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[spuru9]

LGTM