r.d.n: add missing archs to startpage

Signed-off-by: Holger Levsen <holger@layer-acht.org>

hosts/osuosl5-amd64/var/www/html/rdn_index.html

@@ -71,18 +71,18 @@
 	</li><li>
 	<a href="https://riscv64.reproduce.debian.net/">riscv64.reproduce.debian.net</a> rebuilds trixie (arch:riscv64).
 	</li><li>
-	coming soon: unstable/arm64, then...
+	coming soon: unstable/arm64, then... armel, mips64el, ppc64el and s390x.
 	</li>
 	</ul>
 	Do you have hardware?
 	<br/>
-	Because we want more rebuilders and we want them for all Debian architectures!
+	Because we want more, independent, rebuilders and we want them for all Debian architectures!
 	<br/>
 	And: this needs admins, this needs *YOU*!
 	<br/>
 	<br/>
 	Because, for sure, Debian rebuilding Debian is superb and it's something we've been working on for years!
-	So that's great, and we want more: for years we've wanted independent rebuilders too!
+	So this is great, and yet we want more: for years we've wanted independent rebuilders too!
 	<br/>
 	<br/>
 	... so long story short: