fix: map to mentions [WPB-4232] (#2142)

Co-authored-by: Jakub Żerko <iot.zerko@gmail.com>
Co-authored-by: Yamil Medina <yamilmedina@users.noreply.github.com>

app/src/main/kotlin/com/wire/android/ui/home/conversations/model/MessageTypes.kt

@@ -239,7 +239,7 @@ private fun mapToDisplayMentions(uiText: UIText, resources: Resources): Pair<Lis
         val mentions = uiText.mentions.sortedBy { it.start }.reversed()
         val mentionList = mentions.mapNotNull {
             // secured crash for mentions caused by web when text without mentions contains mention data
-            if (it.start + it.length < uiText.value.length && uiText.value.elementAt(it.start) == '@') {
+            if (it.start + it.length <= uiText.value.length && uiText.value.elementAt(it.start) == '@') {
                 val mentionName = uiText.value.substring(it.start, it.start + it.length)
                 stringBuilder.insert(it.start + it.length, MENTION_MARK)
                 stringBuilder.insert(it.start, MENTION_MARK)