Update version display on web UI (#3405)

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [x] Refactoring

---------

Signed-off-by: jinhai <haijin.chn@gmail.com>

api/db/runtime_config.py

@@ -13,7 +13,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
-from api.versions import get_versions
+from api.versions import get_ragflow_version
 from .reload_config_base import ReloadConfigBase
 
 
@@ -35,7 +35,7 @@ class RuntimeConfig(ReloadConfigBase):
 
     @classmethod
     def init_env(cls):
-        cls.ENV.update(get_versions())
+        cls.ENV.update({"version": get_ragflow_version()})
 
     @classmethod
     def load_config_manager(cls):