[MINOR][DOCS] Fix miss semicolon on describe sql example

### What changes were proposed in this pull request?

fix miss semicolon on describe SQL example

### Why are the changes needed?

describe SQL example miss semicolon

### Does this PR introduce _any_ user-facing change?

Yes. the patch fix docs miss semicolon SQL.

### How was this patch tested?

Manually by inspecting generated docs.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes apache#49316 from camilesing/fix_docs_miss_semicolon.

Authored-by: camilesing <[email protected]>
Signed-off-by: Max Gekk <[email protected]>

docs/sql-ref-syntax-aux-describe-function.md

@@ -85,7 +85,7 @@ DESC FUNCTION max;
 
 -- Describe a builtin user defined aggregate function
 -- Returns function name, implementing class and usage and examples.
-DESC FUNCTION EXTENDED explode
+DESC FUNCTION EXTENDED explode;
 +---------------------------------------------------------------+
 |function_desc                                                  |
 +---------------------------------------------------------------+