[deps]: Update bitwarden/self-host Docker tag to v2025.2.1 (#312)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docker-compose.yml

@@ -4,7 +4,7 @@ services:
       - db
     env_file:
       - .env
-    image: bitwarden/self-host:2025.1.1-beta # https://github.com/bitwarden/self-host/releases
+    image: bitwarden/self-host:2025.2.1-beta # https://github.com/bitwarden/self-host/releases
     restart: always
     ports:
       - ${VAULT_HOST_PORT}:8443