Clarify injectable objects in spec document

[NicolaIsotta]

https://jakarta.ee/specifications/faces/4.0/jakarta-faces-4.0#cdi-integration (4.0)
https://jakarta.ee/specifications/faces/4.1/jakarta-faces-4.1#cdi-integration (4.1)
https://jakarta.ee/specifications/faces/5.0/jakarta-faces-5.0-m1#cdi-integration (5.0)

• jakarta.faces.component.UIViewRoot is missing
• jakarta.faces.flow.Flow is missing (only 4.1+)
• should HttpSession be removed? It's handled by Servlet
• should jakarta.faces.annotation.ManagedProperty be mentioned?

[arjantijms]

should HttpSession be removed? It's handled by Servlet

It's currently handled by the platform spec.

It should be done by the Servlet spec indeed.