Refactor DatasetController search endpoint to remove unnecessary path parameter

src/main/java/de/uni_passau/fim/PADAS/group3/DataDash/Dataset/DatasetController.java

@@ -81,7 +81,7 @@ public class DatasetController {
         return new ResponseEntity<>(datasetService.getDatasetById(id), HttpStatus.OK);
     }
 
-    @GetMapping("/search")
+    @GetMapping
     public ResponseEntity<Page<Dataset>> search(
         @RequestParam(value = "search", required = false, defaultValue = "%") String search,
         @RequestParam(value = "page", required = false, defaultValue = "0") int page,