Fix inaccurate donate note — the stack doesn't ship a donation address

The donate band said "Monero, naturally — the same address Pithead ships with,"
but Pithead doesn't ship with this (or any) donation address baked in — users
set their own payout address in config.json. Kept the accurate, on-brand part
(it's a Monero address) and dropped the false claim:

  "Monero, naturally — straight to the people who build it."

Reads consistently with the donate band's "Funded by the people who run it."

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: VijitSingh97

data/content.yaml

@@ -159,7 +159,7 @@ roadmap:
     eyebrow: "// fuel the roadmap"
     title: "Built in the open. Funded by the people who run it."
     text: "Every wave above shipped by hand, issue by issue, out in the open. If this stack saved you time, fuel the next wave."
-    note: "Monero, naturally — the same address Pithead ships with."
+    note: "Monero, naturally — straight to the people who build it."
 
 # "How we build" — the ethos.
 ethos: