main/python3: add python-config

we now link python to python3. autotools imports the first found python
as $PYTHON (unless PYTHON is set), and some autoconf scripts are using
$PYTHON-config to find this, which doesn't exist (only python3-config).
so, add this to be consistent with the python link.

main/python3/APKBUILD

@@ -5,7 +5,7 @@ pkgname=python3
 pkgver=3.10.8
 _bluez_ver=5.65
 _basever="${pkgver%.*}"
-pkgrel=1
+pkgrel=2
 pkgdesc="A high-level scripting language"
 url="https://www.python.org/"
 arch="all"
@@ -193,6 +193,7 @@ package() {
 		"$pkgdir"/usr/lib/python*/tkinter
 
 	ln -s /usr/bin/python3 "$pkgdir"/usr/bin/python
+	ln -s /usr/bin/python3-config "$pkgdir"/usr/bin/python-config
 }
 
 dev() {