Run path-filters only on pull requests CI runs

[Praveen2112]

Description

Path-filters CI job allows us to identify if the change is on docs or actual code change - Ref : #27070 and we would like to run the job only when for PR.

Additional context and related issues

Release notes

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## Section
* Fix some things. ({issue}`issuenumber`)

Summary by Sourcery

CI:

• Add an if condition to run the path-filters job only on pull_request events

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR refines the GitHub Actions CI pipeline by adding a conditional check so that the path-filters job only executes on pull_request events.

File-Level Changes

Change	Details	Files
Restrict path-filters CI job to pull request events	Insert if: github.event_name == 'pull_request' into the path-filters job definition	.github/workflows/ci.yml

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