chore(ci): Fix double issue creation for unreferenced PRs

[Lms24]

This fixes a problem, where our unreferenced PR GH workflow would trigger another new issue being created because of a race condition between creating the issue and updating the PR description automatically.

Closes #18445 (added automatically)

[github-actions]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,706	-	8,713	-0%
GET With Sentry	1,774	20%	1,730	+3%
GET With Sentry (error only)	6,178	71%	6,072	+2%
POST Baseline	1,188	-	1,199	-1%
POST With Sentry	600	51%	596	+1%
POST With Sentry (error only)	1,053	89%	1,061	-1%
MYSQL Baseline	3,311	-	3,350	-1%
MYSQL With Sentry	494	15%	477	+4%
MYSQL With Sentry (error only)	2,680	81%	2,717	-1%

View base workflow run