Correct typo 'Succesfully' in Action success messages

[robocopklaus]

Summary

"Succesfully" is misspelled (missing an 's') in two user-facing success messages.

Problem

// GenerateAltTextAction.php:115
'Succesfully generated alt text for 1 asset.'

// GenerateAltTextAction.php:117
'Succesfully generated alt text for {count} assets.'

Suggested Fix

'Successfully generated alt text for 1 asset.'
'Successfully generated alt text for {count} assets.'

References

• File: src/Actions/GenerateAltTextAction.php:115,117
• Consolidated review finding: V12