Update release-notes.md

Fixed formatting of the heading

documentation/docs/release-notes/release-notes.md

@@ -1,6 +1,6 @@
 # pg_tde release notes
 
- ## Alpha 1 (2024-03-28)
+## Alpha 1 (2024-03-28)
 
 `pg_tde` extension brings in [Transparent Data Encryption (TDE)](tde.md) to PostgreSQL and enables you to keep sensitive data safe and secure.
 
@@ -42,4 +42,4 @@ The Minimum Viable Product (MVP) version introduces the following functionality:
 * Encryption of heap tables, including TOAST
 * Encryption keys are stored either in Hashicorp Vault server or in local keyring file (for development) 
 * The key storage is configurable via separate JSON configuration files
-* Replication support
+* Replication support