LG 4-1: add "e.g." to ISO-25010, and quote additional sources

[Dr. Gernot Starke]

old:

• the concept of quality and quality characteristics (based on [ISO 25010])
• generic quality models (such as [ISO 25010])

new:

• the concept of quality and quality characteristics (based on e.g. [ISO 25010] or [Bass+2021])
• generic quality models (such as [ISO 25010], [Bass+2021], [Q42])

[Dr. Gernot Starke]

prerequisite: [Q42] has been added to references:

• Q42 - The arc42 Quality Model, https://quality.arc42.org

[Dr. Gernot Starke]

@mikesperber could you please ack or disagree with this... (it's the last issue before we release 2023...)

[Alexander Lorz]

I support this proposal.

[Roger Rhoades]

I'm fine with the new formulation

[Mike Sperber]

@mikesperber could you please ack or disagree with this... (it's the last issue before we release 2023...)

Agree.