Update dependency org.jetbrains.kotlinx:kotlinx-collections-immutable to v0.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlinx:kotlinx-collections-immutable	0.3.8 → 0.4.0

---

Release Notes

Kotlin/kotlinx.collections.immutable (org.jetbrains.kotlinx:kotlinx-collections-immutable)

v0.4.0

• Fixed the equality bug in PersistentMap — Added proper node promotion during mutable operations to ensure a consistent internal tree structure #​217
• Fixed the bug in PersistentMap equals implementation — Ensured proper node promotion during mutable key removal even when nodes share the same owner #​218
• Fixed the ghost element issue in PersistentHashSet — Corrected condition check order to ensure proper recursive element promotion after collision removal #​219
• Updated Kotlin to version 2.1.20 and core dependencies #​213
• Enabled '-Xjvm-default=disable' explicitly to prevent API dump changes #​210

---

• If you want to rebase/retry this PR, check this box

---

🔕 Ignore: Close this PR and you won't be reminded about these updates again.