Bug 1828684 - Update font style for number of selected tabs text

After confiriming with UX, we have updated the style of the font
indicating how many tabs are currently selected when in select
mode in Compose tabs tray.

app/src/main/java/org/mozilla/fenix/tabstray/TabsTrayBanner.kt

@@ -45,7 +45,6 @@ import androidx.compose.ui.semantics.testTag
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.DpOffset
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import mozilla.components.browser.state.state.ContentState
 import mozilla.components.browser.state.state.TabSessionState
 import mozilla.components.lib.state.ext.observeAsComposableState
@@ -428,10 +427,8 @@ private fun MultiSelectBanner(
 
         Text(
             text = stringResource(R.string.tab_tray_multi_select_title, selectedTabCount),
-            style = FirefoxTheme.typography.body1,
+            style = FirefoxTheme.typography.headline6,
             color = FirefoxTheme.colors.textOnColorPrimary,
-            fontSize = 20.sp,
-            fontWeight = FontWeight.W500,
         )
 
         Spacer(modifier = Modifier.weight(1.0f))