Cannot find how my jobs are bound to runners

I have a pipeline set up on Gitlab, within which my project is built and unit tests are run every time I commit a change to “developer” git branch.
Recently I’ve updated versions of some libraries in the project and after that builds on CICD started to fail and says that node.js version should be updated.
As I undestand I need to somehow edit settings of a container in which builds are run.
We have our own gitlab instance. As I see from the settings there are group of shared runners, used from many projects.
How can I find out which of those runners are used for my project? in the Gitlab GUI I can see tags assigned to the shared runners, but I don’t see any tags in my .gitlab-ci.yml

Gitlab version is 15.4.2-ee