Update 0043_how_to_format_sql.md

Author: NikolayS

0043_how_to_format_sql.md

@@ -2,7 +2,7 @@ Originally from: [tweet](https://twitter.com/samokhvalov/status/1722155043569496
 
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-# How to format SQL
+# How to format SQL (SQL style guide)
 
 > I post a new PostgreSQL "howto" article every day. Join me in this
 > journey – [subscribe](https://twitter.com/samokhvalov/), provide feedback, share!