SDL: CI, macOS: install autoconf. (f62b8)

SDL Commits
1 
From f62b86263ac3443af9cce33f0e7ac72ec0250c44 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 24 Apr 2024 00:33:14 +0300
Subject: [PATCH] CI, macOS: install autoconf.

Reference issue: https://github.com/libsdl-org/SDL/issues/9606 .

(cherry picked from commit 26e3d65ea8510c59dc3fae9e5a3220d9b125aa67)
---
 .github/workflows/main.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 223d404d660e0..21ea7de3f9466 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -64,6 +64,7 @@ jobs:
       if: runner.os == 'macOS'
       run: |
         brew install \
+          autoconf \
           ninja \
           pkg-config