chore: update about us page

.vscode/settings.json

src/app/page/enum/page.enum.ts

src/app/page/page.component.html

src/app/page/page.component.scss

src/app/page/page.component.ts

src/app/page/services/page.service.ts

src/app/post/components/post-card/post-card.component.html

src/app/post/components/post-card/post-card.component.scss

.../post/components/post-details/post-details.component.html

.../post/components/post-details/post-details.component.scss

.../post/components/post-publish/post-publish.component.html

src/assets/scss/_ghost.scss