docs: update taosdump doc for 3.0 (#21130)

* fix: taosbenchmark escape char for 3.0

* fix: json file for escape char

* docs: update taosdump doc

docs/en/14-reference/06-taosdump.md

@@ -76,6 +76,7 @@ Usage: taosdump [OPTION...] dbname [tbname ...]
   -A, --all-databases        Dump all databases.
   -D, --databases=DATABASES  Dump listed databases. Use comma to separate
                              database names.
+  -e, --escape-character     Use escaped character for database name
   -N, --without-property     Dump database without its properties.
   -s, --schemaonly           Only dump table schemas.
   -y, --answer-yes           Input yes for prompt. It will skip data file

docs/zh/14-reference/06-taosdump.md

@@ -79,6 +79,7 @@ Usage: taosdump [OPTION...] dbname [tbname ...]
   -A, --all-databases        Dump all databases.
   -D, --databases=DATABASES  Dump inputted databases. Use comma to separate
                              databases' name.
+  -e, --escape-character     Use escaped character for database name
   -N, --without-property     Dump database without its properties.
   -s, --schemaonly           Only dump tables' schema.
   -y, --answer-yes           Input yes for prompt. It will skip data file