docs(search): add changeset file

Co-authored-by: Emma Indal <emma.indahl@gmail.com>
Signed-off-by: Camila Belo <camilaibs@gmail.com>

.changeset/search-moles-wash.md

@@ -0,0 +1,33 @@
+---
+'@backstage/plugin-search': minor
+'example-app': patch
+'@backstage/create-app': patch
+---
+
+Search Modal now relies on the Search Context to access state and state setter. If you use the SidebarSearchModal as described in the [getting started documentation](https://backstage.io/docs/features/search/getting-started#using-the-search-modal), make sure to update your code with the SearchContextProvider.
+
+Before:
+
+```tsx
+export const Root = ({ children }: PropsWithChildren<{}>) => (
+  <SidebarPage>
+    <Sidebar>
+      <SidebarLogo />
+      <SidebarSearchModal />
+      <SidebarDivider />
+    ...
+```
+
+Now:
+
+```tsx
+export const Root = ({ children }: PropsWithChildren<{}>) => (
+  <SidebarPage>
+    <Sidebar>
+        <SidebarLogo />
+        <SearchContextProvider>
+            <SidebarSearchModal />
+        </SearchContextProvider>
+        <SidebarDivider />
+    ...
+```