Update kotlin monorepo to v2.1.20 (#1883)

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/HttpPageLoader.kt

@@ -20,7 +20,9 @@ import tachiyomi.core.common.util.lang.withIOContext
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 import java.util.concurrent.PriorityBlockingQueue
-import java.util.concurrent.atomic.AtomicInteger
+import kotlin.concurrent.atomics.AtomicInt
+import kotlin.concurrent.atomics.ExperimentalAtomicApi
+import kotlin.concurrent.atomics.incrementAndFetch
 import kotlin.math.min
 
 /**
@@ -193,15 +195,16 @@ internal class HttpPageLoader(
 /**
  * Data class used to keep ordering of pages in order to maintain priority.
  */
+@OptIn(ExperimentalAtomicApi::class)
 private class PriorityPage(
     val page: ReaderPage,
     val priority: Int,
 ) : Comparable<PriorityPage> {
     companion object {
-        private val idGenerator = AtomicInteger()
+        private val idGenerator = AtomicInt(0)
     }
 
-    private val identifier = idGenerator.incrementAndGet()
+    private val identifier = idGenerator.incrementAndFetch()
 
     override fun compareTo(other: PriorityPage): Int {
         val p = other.priority.compareTo(priority)