Update dependency symfony/webpack-encore-bundle to v2

This MR contains the following updates:

Package	Type	Update	Change
symfony/webpack-encore-bundle	require	major	^1.16 -> ^2.0

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Release Notes

symfony/webpack-encore-bundle

v2.0.0

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• Minimum PHP version is now 8.1
• Minimum Symfony version is now 5.4

v1.17.0

Compare Source

• Deprecated the stimulus_controller(), stimulus_action() and stimulus_target functions and related classes. Install symfony/stimulus-bundle instead.

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