fix: missing space in ubuntu docker template

[rnitzan]

Proposed changes

Missing space in ubuntu docker template

Incorrect spacing for NAP DoS Ubuntu docker deployment template

No Space between "gpg]https" - causes build to fail

https://docs.nginx.com/nginx-app-protect-dos/deployment-guide/learn-about-deployment/#ubuntu-1804-bionic--2004-focal--2204-jammy--2404-noble-docker-deployment-example
Incorrect statement:

RUN printf "deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg]https://pkgs.nginx.com/plus/ubuntu lsb_release -cs nginx-plus\n" | tee /etc/apt/sources.list.d/nginx-plus.list
Location of Collected Data
https://docs.nginx.com/nginx-app-protect-dos/deployment-guide/learn-about-deployment/#ubuntu-1804-bionic--2004-focal--2204-jammy--2404-noble-docker-deployment-example

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