chore: add document mentions

src/routes/+page.svelte

@@ -62,7 +62,7 @@
 				<p
 					class="font-normal px-5 md:p-0 text-lg md:text-xl text-black text-muted dynadark:text-muted"
 				>
-					All image and audio processing is done on your device.
+					All image, audio, and document processing is done on your device.
 					Videos are converted on our lightning-fast servers. No file
 					size limit, no ads, and completely open source.
 				</p>

src/routes/convert/+page.svelte

@@ -167,7 +167,7 @@
 						We can't convert this file.
 					</p>
 					<p class="font-normal">
-						Only image, video, and audio files are supported
+						Only image, video, audio, and document files are supported
 					</p>
 				</div>
 			{/if}