fix text clipping around external embed's domain (#6012)

src/screens/Profile/Header/Handle.tsx

···
                 a.rounded_xs,
                 {borderColor: t.palette.contrast_200},
               ]
-            : [a.text_md, a.leading_tight, t.atoms.text_contrast_medium],
+            : [a.text_md, a.leading_snug, t.atoms.text_contrast_medium],
           web({wordBreak: 'break-all'}),
         ]}>
         {invalidHandle ? _(msg`⚠Invalid Handle`) : `@${profile.handle}`}

src/view/com/util/post-embeds/ExternalLinkEmbed.tsx

···
                   style={[
                     a.transition_color,
                     a.text_xs,
-                    a.leading_tight,
+                    a.leading_snug,
                     hovered
                       ? t.atoms.text_contrast_high
                       : t.atoms.text_contrast_medium,