Update references to setup.py

Author: radarhere

.github/workflows/wheels.yml

@@ -18,7 +18,7 @@ on:
       - ".github/generate-sbom.py"
       - ".github/workflows/wheels*"
       - "pyproject.toml"
-      - "setup.py"
+      - "_custom_build/pillow_ext.py"
       - "wheels/*"
       - "winbuild/build_prepare.py"
       - "winbuild/fribidi.cmake"

docs/installation/building-from-source.rst

@@ -249,7 +249,7 @@ If the prerequisites are installed in the standard library locations
 for your machine (e.g. :file:`/usr` or :file:`/usr/local`), no
 additional configuration should be required. If they are installed in
 a non-standard location, you may need to configure setuptools to use
-those locations by editing :file:`setup.py` or
+those locations by editing :file:`_custom_build/pillow_ext.py` or
 :file:`pyproject.toml`, or by adding environment variables on the command
 line::
 

tox.ini

@@ -36,4 +36,4 @@ skip_install = true
 deps =
     -r .ci/requirements-mypy.txt
 commands =
-    mypy conftest.py selftest.py setup.py checks docs src winbuild Tests {posargs}
+    mypy conftest.py selftest.py _custom_build/pillow_ext.py checks docs src winbuild Tests {posargs}