flatpak 1.15.4

Security fixes:

* Escape special characters when displaying permissions and metadata,
  preventing malicious apps from manipulating the appearance of the
  permissions list using crafted metadata (CVE-2023-28101).

* If a Flatpak app is run on a Linux virtual console (tty1, tty2, etc.),
  don't allow copy/paste via the TIOCLINUX ioctl (CVE-2023-28100).
  Note that this is specific to virtual consoles: Flatpak is not
  vulnerable to this if run from a graphical terminal emulator such as
  xterm, gnome-terminal or Konsole.

Other bug fixes:

* Document the path used for `flatpak override`
* Translation updates: oc, pl, ru, sv, tr

Git-EVTag-v0-SHA512: da193fee33f3108222ff5e3b48fdd6c41ff5215fd0e556864f597f3a81d521fa794ec1c6918b67c0efe47b9be0a03181d2a1f2ab9910fdb8479d3f5da65372d5
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