l10n: it: fix italian usage messages alignment

[mbeniamino]

Fixed a misalignment in the "usage:" and " or:" lines in the italian
help messages.

[github-actions]

Errors and warnings found by git-po-helper in workflow #1292:

ℹ️ Syntax check with msgfmt
    INFO    [it.po@fabae2b]  5013 translated messages.
❌ Obsolete #~ entries
    ERROR   [it.po@fabae2b]  you have 184 obsolete entries, please remove them
❌ PO filter (.gitattributes)
    ERROR   [it.po@fabae2b]  No Git `filter` attribute is set for *.po files on this path.
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  The filter attribute describes how Git should normalize #: location comments on each
    ERROR   [it.po@fabae2b]  PO entry when you commit. Those comments change often as source files move; committing
    ERROR   [it.po@fabae2b]  their churn produces noisy diffs and inflates the repository.
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  Setting filter=gettext-no-location or filter=gettext-no-line-number in .gitattributes
    ERROR   [it.po@fabae2b]  tells git-po-helper which location style you intend, so it can flag bad #: lines in
    ERROR   [it.po@fabae2b]  the PO (for example references that still include line numbers).
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  Please configure the filter for XX.po, for example:
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]      .gitattributes: *.po filter=gettext-no-location
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  See:
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]      https://lore.kernel.org/git/20220504124121.12683-1-worldhello.net@gmail.com/
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  entry 1@L27 (msgid "Huh (%s)?"): location comment not allowed with gettext-no-location (use --no-location): "#: add-interactive.c:368"
⚠️ msgid/msgstr pattern check
    WARNING [it.po@fabae2b]  mismatched patterns: --dirstat=files,param1,param2..., --dirstat=files,parametro1,parametro2...
    WARNING [it.po@fabae2b]  >> msgid: synonym for --dirstat=files,param1,param2...
    WARNING [it.po@fabae2b]  >> msgstr: sinonimo di --dirstat=files,parametro1,parametro2...
    WARNING [it.po@fabae2b]  
    WARNING [it.po@fabae2b]  mismatched patterns: refs/heads
    WARNING [it.po@fabae2b]  >> msgid: HEAD not found below refs/heads!
    WARNING [it.po@fabae2b]  >> msgstr: HEAD non trovato fra i riferimenti/head!
    WARNING [it.po@fabae2b]  
INFO: checking commits: 0 passed, 1 failed.
ℹ️ Download pot template
INFO: downloading pot file from https://github.com/git-l10n/pot-changes/raw/pot/master/po/git.pot
❌ Incomplete translations found
    ERROR   [it.po@fabae2b]  2174 new string(s) in POT file, but not in your PO file
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]    > POT file:  %s\n
    ERROR   [it.po@fabae2b]    > POT file:  (use \"git am --allow-empty\...
    ERROR   [it.po@fabae2b]    > POT file:  (use \"git pull\" if you wan...
    ERROR   [it.po@fabae2b]    > ...
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  961 obsolete string(s) in your PO file, which must be removed
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]    > PO file:   (%s has become dangling)
    ERROR   [it.po@fabae2b]    > PO file:   (%s will become dangling)
    ERROR   [it.po@fabae2b]    > PO file:  (use \"git pull\" to merge t...
    ERROR   [it.po@fabae2b]    > ...
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  You can download the latest POT file from:
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  	https://github.com/git-l10n/pot-changes/raw/pot/master/po/git.pot
    ERROR   [it.po@fabae2b]  
    ERROR   [it.po@fabae2b]  Please rebase your branch to the latest upstream branch,
    ERROR   [it.po@fabae2b]  run "git-po-helper update PO-FILE" to update your po file,
    ERROR   [it.po@fabae2b]  and translate the new strings in it.
    ERROR   [it.po@fabae2b]  
ERROR: check-commits command failed

[jiangxin]

Errors and warnings found by git-po-helper in workflow #1292:

Your fix is unrelated to the CI issues reported above; please ignore that error report. It will be merged in the next localization window.