fix nightly lint failing the CI pipelines

[V0ldek]

Short description

New nightly lint elided_named_lifetimes got triggered on a function in rsonpath-syntax. In this case the named lifetime is redundant itself, so the fix is to just turn it into an anonymous one.

Checklist

All of these should be ticked off before you submit the PR.

• I ran just verify locally and it succeeded.
• Issue was given go ahead and is linked above OR I have included justification for a minor change.
• Unit tests for my changes are included OR no functionality was changed.