flask: Wheel name is not uppercase

Fixes
Successfully built flask-2.0.2-py3-none-any.whl
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/builder/shared-workdir/build/sdk/staging_dir/hostpkg/lib/python3.11/site-packages/installer/__main__.py", line 98, in <module>
    _main(sys.argv[1:], "python -m installer")
  File "/builder/shared-workdir/build/sdk/staging_dir/hostpkg/lib/python3.11/site-packages/installer/__main__.py", line 86, in _main
    with WheelFile.open(args.wheel) as source:
  File "/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_cortex-a53_musl/usr/lib/python3.11/contextlib.py", line 137, in __enter__
    return next(self.gen)
           ^^^^^^^^^^^^^^
  File "/builder/shared-workdir/build/sdk/staging_dir/hostpkg/lib/python3.11/site-packages/installer/sources.py", line 162, in open
    with zipfile.ZipFile(path) as f:
         ^^^^^^^^^^^^^^^^^^^^^
  File "/builder/shared-workdir/build/sdk/staging_dir/target-aarch64_cortex-a53_musl/usr/lib/python3.11/zipfile.py", line 1311, in __init__
    self.fp = io.open(file, filemode)
              ^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/builder/shared-workdir/build/sdk/build_dir/target-aarch64_cortex-a53_musl/pypi/Flask-2.0.2//openwrt-build/Flask-2.0.2-*.whl'

Signed-off-by: Josef Schlehofer <[email protected]>

Author: BKPepe

lang/python/Flask/Makefile

@@ -8,7 +8,8 @@ PKG_NAME:=Flask
 PKG_VERSION:=2.0.2
 PKG_RELEASE:=6
 
-PYPI_NAME:=$(PKG_NAME)
+PYPI_NAME:=Flask
+PYPI_SOURCE_NAME:=flask
 PKG_HASH:=7b2fb8e934ddd50731893bdcdb00fc8c0315916f9fcd50d22c7cc1a95ab634e2
 
 PKG_MAINTAINER:=Michal Vasilek <[email protected]>