update changelog.mdx

Author: joshstevens19

Cargo.lock

@@ -26,6 +26,10 @@ github branch - https://github.com/joshstevens19/rindexer/tree/release/0.26.0
 - mac apple intel binary - https://github.com/joshstevens19/rindexer/releases/download/v0.26.0/rindexer_darwin-amd64.tar.gz
 - windows binary - https://github.com/joshstevens19/rindexer/releases/download/v0.26.0/rindexer_win32-amd64.zip
 
+### Features
+-------------------------------------------------
+- feat: expose PostgresClient::raw_connection so its easier to do transactions
+
 ### Bug fixes
 -------------------------------------------------
 - fix: start indexer and graphql when a rust project is started without any commands