💄(frontend) fix icon position in callout block

Make sure the icon in the callout block is aligned to the top instead of
centered when we have multi-line content.

Signed-off-by: Anto59290 <antonin59290@hotmail.com>

src/frontend/apps/impress/src/features/docs/doc-editor/components/custom-blocks/CalloutBlock.tsx

@@ -97,7 +97,12 @@ const CalloutComponent = ({
       `}
     >
       <CalloutBlockStyle />
-      <Box $position="relative">
+      <Box
+        $position="relative"
+        $css={css`
+          align-self: start;
+        `}
+      >
         <BoxButton
           contentEditable={false}
           onClick={toggleEmojiPicker}