pinentry: updated to 1.2.0

Noteworthy changes in version 1.2.0 (2021-08-25)
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* qt: Show a warning if Caps Lock is on on Windows, X11 (requires
  libX11 and Qt5X11Extras), and Wayland (requires KF5WaylandClient).
  [T4950]

* qt: Support password formatting.  This makes generated passwords
  easier to transcript. [T5517]

* qt: Fix showing of pinentry window on Wayland.  [T5528]

* qt: Check passphrase constraints before accepting passphrase if
  passphrase constraints are requested to be enforced.  [T5532]

* qt: Improve detection of running in a GUI session.  [T3659]

* qt: Improve accessibility when entering new password.

(adam)