Updates from Gitea, step 5: the daily check's announcement, the docs, ADR 0009

The announcement was cut at the notification's 48 bytes; it now reads
"v0.11.0 is out: see Settings > Firmware". README: Updates from Gitea
and its limits. ADR 0009: the device trusts the two ISRG roots. R1.md:
what was built and the checks on the device, with what wasn't checked.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/main.cpp

@@ -510,6 +510,9 @@ static void updateCommand(const String& args) {
         args.startsWith("damage cut") ? update->damageNextDownload(n, -1) : update->damageNextDownload(-1, n);
         console.printf("update: the next download will be %s at byte %ld\n", args.startsWith("damage cut") ? "cut" : "damaged", n);
 
+    } else if (args == "daily") {  // forget today's check: the daily one runs again at once, if it may
+        update->forgetToday();
+        console.println("update: the daily check will run at the next tick if Wi-Fi, the clock and memory allow");
     } else if (args.startsWith("pretend ")) {  // update pretend v0.9.0 | off: what the comparisons take as running
         update->pretendVersion(args.substring(8) == "off" ? "" : args.substring(8).c_str());
         console.printf("update: running %s\n", update->runningVersion().c_str());