Fix missing semicolon in docs/README.md

Add missing semicolon to LOAD statement in installation block.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: rustyconover

docs/README.md

@@ -21,7 +21,7 @@ You can now use this by using this SQL:
 
 ```sql
 install textplot from community;
-load textplot
+load textplot;
 ```
 
 ## Functions