sdl2-compat: ci: only run schedule on libsdl-org/sdl2-compat

SDL Commits
1 
From b34ae329e84535bc532990e147dceec9097251e8 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Tue, 5 Sep 2023 16:05:14 +0200
Subject: [PATCH] ci: only run schedule on libsdl-org/sdl2-compat

---
 .github/workflows/main.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7221fbe..f69d9f2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,6 +10,8 @@ jobs:
   Build:
     name: '${{ matrix.platform.name }}'
     runs-on: '${{ matrix.platform.os }}'
+    # The scheduled event should only run on libsdl-org/sdl2-compat
+    if: ${{ (github.event_name == 'schedule' && github.repository == 'libsdl-org/sdl2-compat') || (github.event_name != 'schedule') }}
     strategy:
       fail-fast: false
       matrix: