Fixes typo in docs twentyhq#5076 (twentyhq#5450)

Micro fix

Fixes twentyhq#5076

packages/twenty-docs/docs/start/self-hosting/docker-compose.mdx

@@ -23,8 +23,8 @@ VERSION=x.y.z BRANCH=branch-name bash <(curl -sL https://git.new/20)
 ## Manual installation
 
 1. Copy the [.env.example](https://github.com/twentyhq/twenty/blob/main/packages/twenty-docker/.env.example) into a `.env` in the same directory where your `docker-compose.yml` file will be
-2. Run the command `openssl rand -base64 32` three times, make note of the string for each
-3. In your .env file, replace the three "replace_me_with_a_random_string_access" with the three random strings you just generated.
+2. Run the command `openssl rand -base64 32` four times, make note of the string for each
+3. In your .env file, replace the three "replace_me_with_a_random_string_access" with the four random strings you just generated.
 
 ```
 ACCESS_TOKEN_SECRET=replace_me_with_a_random_string_access