chore: update @lando/php to ^1.11.1

[AaronFeledy]

• Updated @lando/php to ^1.11.1

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Note

Low Risk
Dependency-only update plus changelog/lockfile refresh; low risk unless @lando/php@1.11.1 introduces behavioral changes in downstream PHP service builds.

Overview
Updates the @lando/php dependency from ^1.11.0 to ^1.11.1, and refreshes package-lock.json to the new resolved tarball/integrity.

Adds an unreleased changelog entry noting the dependency bump (refs #87).

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