Standardize English spelling

Problem/Motivation

cspell reports, among other things,

modules/views_bulk_operations_example/src/Plugin/Action/ViewsBulkOperationExampleAction.php:20:55 - Unknown word (behaviour) -- parameter specifies the behaviour of displayed
Suggestions: [behavior, behaviors, behaver, behaving, belabour]
src/Plugin/views/field/ViewsBulkOperationsBulkForm.php:559:62 - Unknown word (actoins) -- confirmation step for actoins that don't
Suggestions: [actions, actins, cations, action, catkins]
src/Service/ViewsBulkOperationsActionManager.php:185:29 - Unknown word (behaviour) -- Include the expected behaviour (hook system) to avoid
Suggestions: [behavior, behaviors, behaver, behaving, belabour]
src/Service/ViewsBulkOperationsActionProcessor.php:176:56 - Unknown word (behaviour) -- encounter nondeterministic behaviour in
Suggestions: [behavior, behaviors, behaver, behaving, belabour]
tests/src/Unit/ViewsBulkOperationsBatchTest.php:55:13 - Unknown word (messanger) -- // Mock messanger.
Suggestions: [messenger, message, massager, messaged, messages]
tests/views_bulk_operations_test/src/Plugin/Action/ViewsBulkOperationsTestActionV2.php:50:62 - Unknown word (faliures) -- message. We don't except faliures
Suggestions: [failures, failure, failure's, allures, flairs]

Steps to reproduce

see https://git.drupalcode.org/project/views_bulk_operations/-/jobs/5339707

Proposed resolution

standardize spelling

Remaining tasks

make a MR