Add example for getting vertex/edge without specifying tag/edge type (#…

…2342)

* add-example-for-getting-vertex/edge-without-specifying-tag/edge-type

* Update 6.cheatsheet-for-ngql-command.md

* Update 6.cheatsheet-for-ngql-command.md

* Update 2.match.md

docs-2.0/3.ngql-guide/7.general-query-statements/2.match.md

@@ -195,6 +195,11 @@ nebula> MATCH (v) \
         WITH v, properties(v) as props, keys(properties(v)) as kk \
         LIMIT 10000 WHERE [i in kk where props[i] == "Tim Duncan"] \
         RETURN v;
++----------------------------------------------------+
+| v                                                  |
++----------------------------------------------------+
+| ("player100" :player{age: 42, name: "Tim Duncan"}) |
++----------------------------------------------------+
 ```
 ### 匹配点 ID
 
@@ -391,6 +396,15 @@ nebula> MATCH ()-[e]->() \
         WITH e, properties(e) as props, keys(properties(e)) as kk \
         LIMIT 10000 WHERE [i in kk where props[i] == 90] \
         RETURN e;
++----------------------------------------------------+
+| e                                                  |
++----------------------------------------------------+
+| [:follow "player125"->"player100" @0 {degree: 90}] |
+| [:follow "player140"->"player114" @0 {degree: 90}] |
+| [:follow "player133"->"player144" @0 {degree: 90}] |
+| [:follow "player133"->"player114" @0 {degree: 90}] |
+...
++----------------------------------------------------+
 ```
 
 ### 匹配多个 Edge type