refactor(NavHeader.astro): ⚡ Optimise size and scale of pfp in header

set's the header to be 320x320 with a quality of 65 which get's it just under 20kb in avif

src/components/NavHeader.astro

@@ -15,6 +15,9 @@ const optimizedBackground = await getImage({src: myBackground, format: 'avif', q
     <Picture
         src={pfp}
         class="size-40 rounded-full shadow shadow-black m-4"
+        width={320}
+        height={320}
+        quality={65}
         formats={['avif', 'webp', 'jpeg']}
         alt="Arias's profile picture"
     />