docs: correct the order of fields in the sample _explain output

The order of the fields for the example output of the _explain
endpoint do not match with what the current implementation may
return.  In addition that, the current order of the fields in the
documentation looks quite random, which may make it harder to
understand.
diff --git a/src/docs/src/api/database/find.rst b/src/docs/src/api/database/find.rst
index 4aaa068..5dae5f9 100644
--- a/src/docs/src/api/database/find.rst
+++ b/src/docs/src/api/database/find.rst
@@ -1441,13 +1441,12 @@
         Transfer-Encoding: chunked
 
         {
-            "covered": false,
             "dbname": "movies",
             "index": {
                 "ddoc": "_design/0d61d9177426b1e2aa8d0fe732ec6e506f5d443c",
                 "name": "0d61d9177426b1e2aa8d0fe732ec6e506f5d443c",
-                "partitioned": false,
                 "type": "json",
+                "partitioned": false,
                 "def": {
                     "fields": [
                         {
@@ -1456,12 +1455,14 @@
                     ]
                 }
             },
+            "partitioned": false,
             "selector": {
                 "year": {
                     "$gt": 2010
                 }
             },
             "opts": {
+                "use_index": [],
                 "bookmark": "nil",
                 "limit": 2,
                 "skip": 0,
@@ -1472,30 +1473,13 @@
                     "year",
                     "title"
                 ],
+                "partition": "",
                 "r": 1,
                 "conflicts": false,
-                "execution_stats": false,
-                "partition": "",
-                "stable": false,
                 "stale": false,
                 "update": true,
-                "use_index": []
-            },
-            "mrargs": {
-                "conflicts": "undefined",
-                "direction": "fwd",
-                "end_key": [
-                    "<MAX>"
-                ],
-                "include_docs": true,
-                "partition": null,
-                "reduce": false,
                 "stable": false,
-                "start_key": [
-                    2010
-                ],
-                "update": true,
-                "view_type": "map"
+                "execution_stats": false
             },
             "limit": 2,
             "skip": 0,
@@ -1505,7 +1489,23 @@
                 "year",
                 "title"
             ],
-            "partitioned": false
+            "mrargs": {
+                "include_docs": true,
+                "view_type": "map",
+                "reduce": false,
+                "partition": null,
+                "start_key": [
+                    2010
+                ],
+                "end_key": [
+                    "<MAX>"
+                ],
+                "direction": "fwd",
+                "stable": false,
+                "update": true,
+                "conflicts": "undefined"
+            },
+            "covered": false
         }
 
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