[Bug 57501] New: Upgrade fails in Debian testing with apt 2.9.16

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57501

Bug ID: 57501
           Summary: Upgrade fails in Debian testing with apt 2.9.16
           Product: Packaging
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-packages
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
      Distribution: ---

Using current repository key from https://dl.winehq.org/wine-builds/winehq.key

started failing in Debian testing as follows:

Warning: https://dl.winehq.org/wine-builds/debian/dists/trixie/InRelease: The
key(s) in the keyring /etc/apt/keyrings/winehq.key are ignored as the file has
an unsupported filetype.
Warning: An error occurred during the signature verification. The repository is
not updated and the previous index files will be used. GPG error:
https://dl.winehq.org/wine-builds/debian trixie InRelease: The following
signatures couldn't be verified because the public key is not available:
NO_PUBKEY 76F1A20FF987672F
Warning: Failed to fetch
https://dl.winehq.org/wine-builds/debian/dists/trixie/InRelease  The following
signatures couldn't be verified because the public key is not available:
NO_PUBKEY 76F1A20FF987672F
Warning: Some index files failed to download. They have been ignored, or old
ones used instead.