Fix some issues reported by lintian

Fix some issues reported by lintian

• Update lintian override info format in d/yubikey-manager-qt.lintian-overrides on line 2-3. (mismatched-override)
• Update standards version to 4.6.2, no changes needed. (out-of-date-standards-version)

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/ca/f99058cadcf571fdf941063bb31a3d7a6d1dd2.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/da/1e3f542540b29a32dd983e5a7894de5c9da3fe.debug

No differences were encountered between the control files of package **yubikey-manager-qt**

Control files of package yubikey-manager-qt-dbgsym: lines which differ (wdiff format)

• Build-Ids: da1e3f542540b29a32dd983e5a7894de5c9da3fe caf99058cadcf571fdf941063bb31a3d7a6d1dd2

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/yubikey-manager-qt/185b166a-bf09-4300-9437-2f774a874b37.