RFR: Section on project maintenance [v3]

[Jesper Wilhelmsson]

On Tue, 27 Sep 2022 06:55:09 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update after Ludvig's review
>
> src/guide/project-maintenance.md line 16:
> 
>> 14: 
>> 15: ~~~
>> 16: git clone git at github.com:OpenDuke/my-project.git project-merge
> 
> People may not realise that `OpenDuke` is a username here.

Clarified.

> src/guide/project-maintenance.md line 62:
> 
>> 60: ~~~
>> 61: 
>> 62: These commands will remove the temporary branch that we created to perform the merge.
> 
> The github UI has a button to delete the branch after you have integrated the PR.

Added a sentence about this.

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PR: https://git.openjdk.org/guide/pull/92