ci: latest pip resolver giving installation errors

[ParthS007]

Collecting iniconfig
  Downloading iniconfig-1.1.0.tar.gz (8.1 kB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
    Preparing wheel metadata: started
    Preparing wheel metadata: finished with status 'done'
ERROR: Requested iniconfig from https://files.pythonhosted.org/packages/44/39/e96292c7f7068e58877f476908c5974dc76c37c623f1fa332fe4ed6dfbec/iniconfig-1.1.0.tar.gz#sha256=150a59361017218f4621a68ea9984772675a7f6e074ff7d02e115152f1804dc6 (from pytest<7,>=6->pytest-invenio==1.4.0->-r .min-3.6-requirements.txt (line 4)) has different version in metadata: '0.0.0'

SImilar issue here -> inveniosoftware/invenio-app#76

[mvidalgarcia]

A similar issue was solved by pinning iniconfig

Check other repos: https://github.com/search?q=org%3Ainveniosoftware+iniconfig&type=code