repo: don't forget to close data_index when dropping

dvc/repo/__init__.py

@@ -385,6 +385,7 @@ class Repo:
             except KeyError:
                 pass
         self.data_index.commit()
+        self.data_index.close()
         self._reset()
 
     def get_data_index_entry(

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
     "configobj>=5.0.6",
     "distro>=1.3",
     "dpath<3,>=2.1.0",
-    "dvc-data>=3.1,<3.2",
+    "dvc-data>=3.1.1,<3.2",
     "dvc-http>=2.29.0",
     "dvc-render>=1.0.0,<2",
     "dvc-studio-client>=0.17.1,<1",