Promote Regex.matchAt and matchesAt to Stable #KT-51470

libraries/stdlib/native-wasm/src/kotlin/text/Regex.kt

@@ -168,8 +168,8 @@ public actual class Regex internal constructor(internal val nativePattern: Patte
     /** Indicates whether the regular expression can find at least one match in the specified [input]. */
     actual fun containsMatchIn(input: CharSequence): Boolean = find(input) != null
 
-    @SinceKotlin("1.5")
-    @ExperimentalStdlibApi
+    @SinceKotlin("1.7")
+    @WasExperimental(ExperimentalStdlibApi::class)
     public actual fun matchesAt(input: CharSequence, index: Int): Boolean =
         // TODO: expand and simplify
         matchAt(input, index) != null
@@ -221,8 +221,8 @@ public actual class Regex internal constructor(internal val nativePattern: Patte
      */
     actual fun matchEntire(input: CharSequence): MatchResult?= doMatch(input, Mode.MATCH)
 
-    @SinceKotlin("1.5")
-    @ExperimentalStdlibApi
+    @SinceKotlin("1.7")
+    @WasExperimental(ExperimentalStdlibApi::class)
     public actual fun matchAt(input: CharSequence, index: Int): MatchResult? {
         if (index < 0 || index > input.length) {
             throw IndexOutOfBoundsException("index is out of bounds: $index, input length: ${input.length}")