fix(docs-infra): fix tour of heroes global styles (#45329)
fix(docs-infra): fix tour of heroes global styles (#45329)

fix button styles in src/styles.css that are missing from code snippets

PR Close #45329

JiaLiPassion/angular,gnomeontherun/angular,gkalpak/angular,gkalpak/angular,angular-indonesia/angular,gnomeontherun/angular,angular-indonesia/angular,angular/angular,gnomeontherun/angular,gkalpak/angular,JiaLiPassion/angular,angular/angular,gnomeontherun/angular,gkalpak/angular,angular-indonesia/angular,JiaLiPassion/angular,angular-indonesia/angular,angular/angular,JiaLiPassion/angular,angular/angular