SDL: ci: install pkg-config on Macos runner (81714)

From 817141c162377e590f2d2e16b3b82dbdd7f71743 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Thu, 16 Feb 2023 20:56:51 +0100
Subject: [PATCH] ci: install pkg-config on Macos runner

(cherry picked from commit 86f0c694653eb1f1e91213c7faf3080a96c6375b)
---
 .github/workflows/main.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b09ae9447a8e..e7b737c5bc86 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -59,7 +59,8 @@ jobs:
       if: runner.os == 'macOS'
       run: |
         brew install \
-          ninja
+          ninja \
+          pkg-config
     - uses: actions/checkout@v3
     - name: Check that versioning is consistent
       # We only need to run this once: arbitrarily use the Linux/CMake build