CI: Fix *-x86_64-darwin jobs to run on Intel runner instead of arm64

Author: jirutka

.github/workflows/binaries.yml

@@ -97,7 +97,7 @@ jobs:
 
   njs-x86_64-darwin:
     name: njs-${{ matrix.NJS_VERSION }}${{ matrix.VARIANT }}-x86_64-darwin
-    runs-on: macos-latest
+    runs-on: macos-15-intel
     strategy:
       matrix:
         NJS_VERSION:
@@ -202,7 +202,7 @@ jobs:
 
   nginx-x86_64-darwin:
     name: nginx-${{ matrix.NGINX_VERSION }}-x86_64-darwin
-    runs-on: macos-latest
+    runs-on: macos-15-intel
     strategy:
       matrix:
         NGINX_VERSION: