update search-headless dependencies version to 2.6.0-beta (#201)

Update search-core and search-headless versions to 2.6.0-beta which introduce support for Generative Direct Answer

J=CLIP-1226
TEST=auto

ran `npm run test`

THIRD-PARTY-NOTICES

@@ -62,7 +62,7 @@ SOFTWARE.
 
 The following NPM package may be included in this product:
 
- - @yext/search-core@2.5.0
+ - @yext/search-core@2.6.0-beta
 
 This package contains the following license and notice below:
 
@@ -106,7 +106,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 The following NPM package may be included in this product:
 
- - @yext/search-headless@2.5.0
+ - @yext/search-headless@2.6.0-beta
 
 This package contains the following license and notice below:
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@yext/search-headless-react",
-  "version": "2.4.0",
+  "version": "2.5.0-beta",
   "description": "The official React UI Bindings layer for Search Headless",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",
@@ -38,7 +38,7 @@
     "generate-notices": "generate-license-file --input package.json --output THIRD-PARTY-NOTICES --overwrite"
   },
   "dependencies": {
-    "@yext/search-headless": "^2.5.0",
+    "@yext/search-headless": "^2.6.0-beta",
     "use-sync-external-store": "^1.1.0"
   },
   "devDependencies": {