docs: document shallow equality emit for ActivatedRoute (#42280)
docs: document shallow equality emit for ActivatedRoute (#42280)

fixes #40769

PR Close #42280

mgechev/angular,mgechev/angular,JiaLiPassion/angular,shairez/angular,angular/angular,gnomeontherun/angular,gkalpak/angular,angular-indonesia/angular,gkalpak/angular,angular-indonesia/angular,manekinekko/angular,gkalpak/angular,mgechev/angular,angular/angular,JiaLiPassion/angular,brandonroberts/angular,brandonroberts/angular,mgechev/angular,ocombe/angular,angular/angular,brandonroberts/angular,angular/angular,brandonroberts/angular,ocombe/angular,gnomeontherun/angular,ocombe/angular,shairez/angular,ocombe/angular,ocombe/angular,shairez/angular,mgechev/angular,manekinekko/angular,gnomeontherun/angular,ocombe/angular,shairez/angular,gnomeontherun/angular,angular-indonesia/angular,JiaLiPassion/angular,manekinekko/angular,shairez/angular,angular-indonesia/angular,manekinekko/angular,JiaLiPassion/angular,brandonroberts/angular,gkalpak/angular,manekinekko/angular,brandonroberts/angular,manekinekko/angular