fix(LoginForm): improve login throttle warning wording

[MHJanny]

• Resolves: Better wording for login warning #56429

Summary

Changed the login throttle warning to be more user-friendly and less technical.

TODO

• Update message in LoginForm.vue

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (not needed - text only change)
• Screenshots before/after (optional but nice)
• Documentation not required
• Backports requested
• Labels added
• Milestone added

[joshtrichards]

/compile

[susnux]

@MHJanny please do not merge master into your branch but rather rebase onto master.

Also to get this merged please rebase and then compile the assets (run npm ci && npm run build and then commit the changes in dist as a new commit).

[MHJanny]

Rebased onto master and recompiled assets as requested.

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

[rakekniven]

Backport necessary?

[susnux]

/backport to stable34

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