fix(markdown): fix single-formatted headings & list items (#1820)

* fix(markdown): fix formatting & inline edge cases (show behavior before change)

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

* add change and updated test data

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

* update lock

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

* improve test case

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

---------

Signed-off-by: Panos Vagenas <pva@zurich.ibm.com>

tests/data/groundtruth/docling_v2/2206.01062.json

@@ -1,6 +1,6 @@
 {
   "schema_name": "DoclingDocument",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "name": "2206.01062",
   "origin": {
     "mimetype": "application/pdf",
@@ -23491,7 +23491,8 @@
             }
           ]
         ]
-      }
+      },
+      "annotations": []
     },
     {
       "self_ref": "#/tables/1",
@@ -26654,7 +26655,8 @@
             }
           ]
         ]
-      }
+      },
+      "annotations": []
     },
     {
       "self_ref": "#/tables/2",
@@ -29187,7 +29189,8 @@
             }
           ]
         ]
-      }
+      },
+      "annotations": []
     },
     {
       "self_ref": "#/tables/3",
@@ -31574,7 +31577,8 @@
             }
           ]
         ]
-      }
+      },
+      "annotations": []
     },
     {
       "self_ref": "#/tables/4",
@@ -34177,7 +34181,8 @@
             }
           ]
         ]
-      }
+      },
+      "annotations": []
     }
   ],
   "key_value_items": [],