doc(db): fix typo in doc

Put markdown title instead of Typst title syntax

db/README.md

@@ -1,6 +1,6 @@
-= Deployement
+# Deployement
 
-1. Create the Influx token offline with a influx3 container:
+1. Create the Influx token offline:
 
 ```bash
 echo "apiv3_$(openssl rand -base64 64 | tr -d '+/=')" > secrets/admin-token.txt
@@ -18,5 +18,5 @@ cp .env.template .env
 docker compose up -d
 ```
 
-== Traefik
+## Traefik
 A traefik config file is available on [traefik.yml](./traefik.yml). It can be used with an OIDC provider ([Authentik](https://github.com/goauthentik/authentik) in our case) to control access to the database explorer.