Update meson.yml (#1562)

diff --git a/.github/workflows/meson.yml b/.github/workflows/meson.yml
index 1899470..48d496c 100644
--- a/.github/workflows/meson.yml
+++ b/.github/workflows/meson.yml
@@ -1,6 +1,6 @@
 name: meson build and test
 run-name: update pushed to ${{ github.ref }}
-on: [check_run, push]
+on: [check_run, push, pull_request]
 
 jobs:
   publish: