[libadwaita] docs: Fix missing "the"

[Alexander Mikhaylenko <alexm src gnome org>]

commit cfc36e63509e70f81896d444b935fabd2755325a
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Sat Jan 1 17:37:02 2022 +0100

    docs: Fix missing "the"

 src/adw-flap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/adw-flap.c b/src/adw-flap.c
index 2c734358..9a4146b5 100644
--- a/src/adw-flap.c
+++ b/src/adw-flap.c
@@ -1496,8 +1496,8 @@ adw_flap_class_init (AdwFlapClass *klass)
    * Whether the flap is modal.
    *
    * If `TRUE`, clicking the content widget while flap is revealed, as well as
-   * pressing Escape key, will close the flap. If `FALSE`, clicks are passed
-   * through to the content widget.
+   * pressing the <kbd>Esc</kbd> key, will close the flap. If `FALSE`, clicks
+   * are passed through to the content widget.
    *
    * Since: 1.0
    */