RFR: Fix links to #trivial-changes [v3]

[Alexey Ivanov]

On Thu, 7 Aug 2025 11:15:32 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Manuel Hässig has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update src/guide/testing-the-jdk.md
>>   
>>   Co-authored-by: Alexey Ivanov <alexey.ivanov at oracle.com>
>
> src/guide/testing-the-jdk.md line 292:
> 
>> 290: ProblemListing and `@ignore`-ing are done in the JDK source tree, that means a check-in into the repository is needed. This in turn means that a unique JBS issue and a code review are needed. This is a good thing since it makes test problems visible.
>> 291: 
>> 292: * **Code review**: ProblemListing a test is considered a [trivial change]#trivial-changes).
> 
> Suggestion:
> 
> * **Code review**: ProblemListing a test is considered a [trivial change](#trivial-changes).
> 
> Now the opening parenthesis is missing.

I messed up my previous suggestion and I didn't noticed it.

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PR Review Comment: https://git.openjdk.org/guide/pull/156#discussion_r2259964323