fix(linux): Add workaround for Python bug

This works around a Python bug introduced in Python 3.10.2 and
3.9.10 (python-attrs/cattrs#206).

This change should be reverted once that bug is fixed and new
Python packages are available in Debian/Ubuntu.

Fixes #6119.

(cherry picked from commit 10e1697)

linux/keyman-config/debian/control

@@ -13,6 +13,9 @@ Build-Depends:
  help2man,
  ibus,
  python3-all (>= 3.5),
+ python3-all (<< 3.9.10) | python3-all (>= 3.10),
+ python3-all (<< 3.10.2),
+ python3.6 | python3.8 | python3.9 (<< 3.9.10) | python3.10 (<< 3.10.2),
  python3-gi,
  python3-lxml,
  python3-magic,