build: fix builds with new setuptools

Since setuptools v69.3.0, name of the tar file is modified according
to PEP 625. Therefor update the code so it builds correctly again
with newer setuptools versions.

Signed-off-by: Jean-Louis Dupond <jean-louis@dupond.be>

Author: dupondje

Makefile

@@ -3,13 +3,14 @@
 
 RELEASE := $(shell ./build-aux/release)
 PACKAGE_NAME=ovirt-imageio
+PYTHON_PACKAGE_NAME=ovirt_imageio
 PACKAGE_VERSION=$(shell python3 ovirt_imageio/_internal/version.py)
 OUTDIR=dist
 
 VENV_DIR = $(HOME)/.venv/ovirt-imageio
 
 RPM_TOPDIR?=$(PWD)/build/rpm
-TAR_NAME=$(PACKAGE_NAME)-$(PACKAGE_VERSION).tar.gz
+TAR_NAME=$(PYTHON_PACKAGE_NAME)-$(PACKAGE_VERSION).tar.gz
 SPEC_NAME=$(PACKAGE_NAME).spec
 
 GENERATED = \