[SPARK-32887][DOC] Correct the typo for SHOW TABLE

### What changes were proposed in this pull request?
Correct the typo in Show Table document

### Why are the changes needed?
Current Document of Show Table returns in parse error, so it is misleading to users

### Does this PR introduce _any_ user-facing change?
Yes, the document of show table is corrected now

### How was this patch tested?
NA

Closes apache#29758 from Udbhav30/showtable.

Authored-by: Udbhav30 <u.agrawal30@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

docs/sql-ref-syntax-aux-show-table.md

@@ -97,7 +97,7 @@ SHOW TABLE EXTENDED LIKE 'employee';
 +--------+---------+-----------+--------------------------------------------------------------+
 
 -- showing the multiple table details with pattern matching
-SHOW TABLE EXTENDED  LIKE `employe*`;
+SHOW TABLE EXTENDED  LIKE 'employe*';
 +--------+---------+-----------+--------------------------------------------------------------+
 |database|tableName|isTemporary|                         information                          |
 +--------+---------+-----------+--------------------------------------------------------------+
@@ -146,7 +146,7 @@ SHOW TABLE EXTENDED  LIKE `employe*`;
 +--------+---------+----------+---------------------------------------------------------------+
 
 -- show partition file system details
-SHOW TABLE EXTENDED  IN default LIKE `employee` PARTITION (`grade=1`);
+SHOW TABLE EXTENDED  IN default LIKE 'employee' PARTITION (grade=1);
 +--------+---------+-----------+--------------------------------------------------------------+
 |database|tableName|isTemporary|                         information                          |
 +--------+---------+-----------+--------------------------------------------------------------+
@@ -169,7 +169,7 @@ SHOW TABLE EXTENDED  IN default LIKE `employee` PARTITION (`grade=1`);
 +--------+---------+-----------+--------------------------------------------------------------+
 
 -- show partition file system details with regex fails as shown below
-SHOW TABLE EXTENDED  IN default LIKE `empl*` PARTITION (`grade=1`);
+SHOW TABLE EXTENDED  IN default LIKE 'empl*' PARTITION (grade=1);
 Error: Error running query: org.apache.spark.sql.catalyst.analysis.NoSuchTableException:
  Table or view 'emplo*' not found in database 'default'; (state=,code=0)
 ```