[Python-checkins] gh-103884: Docs CI: Only attempt nit-picky PR annotations for PRs (#103889)

[hugovk]

https://github.com/python/cpython/commit/842daa57cf93280dfb3430061007b7d54d3c1353
commit: 842daa57cf93280dfb3430061007b7d54d3c1353
branch: main
author: Hugo van Kemenade <hugovk at users.noreply.github.com>
committer: hugovk <hugovk at users.noreply.github.com>
date: 2023-04-26T20:20:19Z
summary:

gh-103884: Docs CI: Only attempt nit-picky PR annotations for PRs (#103889)

files:
M .github/workflows/doc.yml

diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 3101b30231c3..28300d891ed2 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -56,11 +56,13 @@ jobs:
 
     # Add pull request annotations for Sphinx nitpicks (missing references)
     - name: 'Get list of changed files'
+      if: github.event_name == 'pull_request'
       id: changed_files
       uses: Ana06/get-changed-files at v2.2.0
       with:
         filter: "Doc/**"
     - name: 'Build changed files in nit-picky mode'
+      if: github.event_name == 'pull_request'
       continue-on-error: true
       run: |
         # Mark files the pull request modified