Reorder functions to prevent shadowing warning

contracts/token/ERC721/ERC721Metadata.sol

@@ -76,17 +76,6 @@ contract ERC721Metadata is Context, ERC165, ERC721, IERC721Metadata {
         }
     }
 
-    /**
-    * @dev Returns the base URI set via {_setBaseURI}. This will be
-    * automatically added as a preffix in {tokenURI} to each token's URI, when
-    * they are non-empty.
-    *
-    * _Available since v2.5.0._
-    */
-    function baseURI() external view returns (string memory) {
-        return _baseURI;
-    }
-
     /**
      * @dev Internal function to set the token URI for a given token.
      *
@@ -111,6 +100,17 @@ contract ERC721Metadata is Context, ERC165, ERC721, IERC721Metadata {
         _baseURI = baseURI;
     }
 
+    /**
+    * @dev Returns the base URI set via {_setBaseURI}. This will be
+    * automatically added as a preffix in {tokenURI} to each token's URI, when
+    * they are non-empty.
+    *
+    * _Available since v2.5.0._
+    */
+    function baseURI() external view returns (string memory) {
+        return _baseURI;
+    }
+
     /**
      * @dev Internal function to burn a specific token.
      * Reverts if the token does not exist.