Fix invalid code snippet example in Select documentation (#7105)

Co-authored-by: svc-changelog <[email protected]>

Author: Deuteu

packages/select/changelog/@unreleased/pr-7105.v2.yml

@@ -0,0 +1,5 @@
+type: fix
+fix:
+  description: Fix invalid code snippet example in Select documentation
+  links:
+  - https://github.com/palantir/blueprint/pull/7105

packages/select/src/components/select/select-component.md

@@ -71,7 +71,7 @@ const FilmSelect: React.FC = () => {
             noResults={<MenuItem disabled={true} text="No results." roleStructure="listoption" />}
             onItemSelect={setSelectedFilm}
         >
-            <Button text={selectedFilm?.title} rightIcon="double-caret-vertical" placeholder="Select a film" />
+            <Button text={selectedFilm?.title ?? "Select a film"} rightIcon="double-caret-vertical" />
         </Select>
     );
 };