fix: uninstall/index.md typo (#317)

# uninstall/index.md typo fix ## before ![image](https://github.com/pgroonga/pgroonga.github.io/assets/12870715/655d997b-c040-4f83-bf2e-ebaedbf47dcf) ## after ![image](https://github.com/pgroonga/pgroonga.github.io/assets/12870715/1aab1fbe-18e7-4377-afd1-2d952bcf2812)
pgroonga · Nov 12, 2023 · e579ed9 · e579ed9
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diff --git a/uninstall/index.md b/uninstall/index.md
@@ -9,7 +9,6 @@ You can uninstall PGroonga by the following SQL:
 ```sql
 DROP EXTENSION pgroonga CASCADE;
 ```
-```
 
 If you're using PostgreSQL 9.5 or earlier, you need to also run the following SQL: