.ci/build-wheels.sh: Fix broken sourceforge URL to lame

Both GitHub Actions jobs `linux_wheels` are failing because of a broken sourceforge URL to lame.  Fixing that URL allows these two GitHub Actions jobs to pass.

Author: cclauss

.ci/build-wheels.sh

@@ -57,7 +57,7 @@ make install;
 make distclean;
 
 cd ~/ffmpeg_sources;
-curl -kLO "https://cfhcable.dl.sourceforge.net/project/lame/lame/$LAME_VERSION/lame-$LAME_VERSION.tar.gz"
+curl -kLO "https://downloads.sourceforge.net/project/lame/lame/$LAME_VERSION/lame-$LAME_VERSION.tar.gz"
 tar xzf "lame-$LAME_VERSION.tar.gz"
 cd "lame-$LAME_VERSION"
 ./configure --prefix="$BUILD_DIR" --enable-nasm --enable-shared;

setup.py

@@ -374,7 +374,7 @@ def get_wheel_data():
 with open('README.rst') as fh:
     long_description = fh.read()
 
-setup_requires = []
+setup_requires = ['setuptools']
 if declare_cython:
     setup_requires.append('cython~=3.0.11')