docs(changelog): remove empty sections (#36264)
docs(changelog): remove empty sections (#36264)

The changelog contains some empty sections (such as `### Bug Fixes`). This change removes these empty sections.

PR Close #36264

ocombe/angular,ocombe/angular,gnomeontherun/angular,gdi2290/angular,JiaLiPassion/angular,mgechev/angular,wKoza/angular,gdi2290/angular,wKoza/angular,blesh/angular,JiaLiPassion/angular,wKoza/angular,gnomeontherun/angular,manekinekko/angular,mgechev/angular,manekinekko/angular,ocombe/angular,brandonroberts/angular,mgechev/angular,ocombe/angular,blesh/angular,manekinekko/angular,mgechev/angular,shairez/angular,gdi2290/angular,IdeaBlade/angular,shairez/angular,brandonroberts/angular,gnomeontherun/angular,wKoza/angular,shairez/angular,gkalpak/angular,shairez/angular,angular/angular,manekinekko/angular,gdi2290/angular,alxhub/angular,alxhub/angular,IdeaBlade/angular,ocombe/angular,gkalpak/angular,IdeaBlade/angular,angular-indonesia/angular,alxhub/angular,angular-indonesia/angular,blesh/angular,alxhub/angular,JiaLiPassion/angular,wKoza/angular,brandonroberts/angular,brandonroberts/angular,angular/angular,alxhub/angular,gdi2290/angular,mgechev/angular,ocombe/angular,blesh/angular,gdi2290/angular,manekinekko/angular,brandonroberts/angular,gkalpak/angular,angular/angular,angular-indonesia/angular,blesh/angular,IdeaBlade/angular,gnomeontherun/angular,manekinekko/angular,gkalpak/angular,brandonroberts/angular,shairez/angular,angular-indonesia/angular,IdeaBlade/angular,JiaLiPassion/angular,angular/angular,wKoza/angular