[Doc](typo) Remove redundant symbols and Fix some misspelled words (#17609)

docs/en/docs/data-operate/import/import-way/load-json-format.md

@@ -322,7 +322,7 @@ Example data is as follows:
 [
     {"k1": 1, "k2": "a"},
     {"k1": 2},
-    {"k1": 3, "k2": "c"},
+    {"k1": 3, "k2": "c"}
 ]
 ````
 

docs/zh-CN/docs/data-operate/import/import-way/load-json-format.md

@@ -323,7 +323,7 @@ Doris 支持通过 Json root 抽取 Json 中指定的数据。
 [
     {"k1": 1, "k2": "a"},
     {"k1": 2},
-    {"k1": 3, "k2": "c"},
+    {"k1": 3, "k2": "c"}
 ]
 ```
 

docs/zh-CN/docs/data-table/best-practice.md

@@ -179,4 +179,4 @@ ALTER TABLE session_data ADD ROLLUP rollup_brower(brower,province,ip,url) DUPLIC
 - 增加、修改 Bloom Filter
 - 增加、删除 bitmap index
 
-具体请参照 [Schema 变更](../advanced/alter-table/schema-change.md)
+具体请参照 [Schema 变更](../advanced/alter-table/schema-change.md)

docs/zh-CN/docs/data-table/hit-the-rollup.md

@@ -126,7 +126,7 @@ mysql> SELECT city, sum(cost), max(max_dwell_time), min(min_dwell_time) FROM tab
 mysql> SELECT city, age, sum(cost), min(min_dwell_time) FROM table GROUP BY city, age;
 ```
 
-Doris 会执行这些sql时会自动命中这个 ROLLUP 表。
+Doris 执行这些sql时会自动命中这个 ROLLUP 表。
 
 ### Duplicate 模型中的 ROLLUP