fix admonition warning

 - do not need to indent AND fence (in fact, this may cause incorrect rendering)

Author: josh-heyer

product_docs/docs/edb-postgres-ai/1.3/hybrid-manager/release_notes/hm_1.3.4_rel_notes.mdx

@@ -22,4 +22,3 @@ Hybrid Manager (HM) 1.3.4 is a maintenance release that includes bug fixes, upda
    - PostgreSQL
    - EDB Enterprise Postgres - formerly EDB Postgres Extended Server (PGE)
    - EDB Enterprise Postgres (Oracle Compatible) - formerly EDB Postgres Advanced Server (EPAS)
-!!!