fix: correct product name variable for Copilot Chat window in JetBrai…

[brambhattabhishek]

This pull request fixes the incorrect usage of the product variable in the JetBrains IDE documentation.
It replaces {% data variables.product.prodname_copilot_chat_short %} with {% data variables.product.prodname_copilot_chat %} to accurately display the Copilot Chat product name.

Originally reported in commit acdc94d by @69814059

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[brambhattabhishek]

please review again

[Sharra-writes]

Thanks for the additional information! I'll get this triaged for review.

[brambhattabhishek]

why it's not merging ? please can you check it

[Sharra-writes]

@brambhattabhishek You can't merge commits in this repository, because it's a GitHub-owned repository. First the change has to be reviewed by someone on the Docs writing team, then by a subject matter expert if necessary. This often takes some time, as the Docs team is small and has a lot of documentation to keep up with, and we can't offer timelines. Then, if your PR is cleared, one of the members of the team will merge it (often me, sometimes someone else). If it's not cleared, we'll try to give you a reason why when we close the PR and any associated issues. I hope that helps explain our process!