chore: update coding in public ad wording (#14200)

Co-authored-by: Armand Philippot <59021693+ArmandPhilippot@users.noreply.github.com>

Author: coding-in-public

src/components/RightSidebar/LearnAstroAd.astro

@@ -23,8 +23,6 @@ const headingId = `learn-astro-course-${idCount}`;
 				</svg>
 				<span>150+ video lessons</span>
 			</span>
-			<span>•</span>
-			<span>Astro v5 ready</span>
 		</p>
 		<LinkButton href={offerUrl} class="cta" data-learn-astro-cta>Get 20% off</LinkButton>
 	</aside>