fix: Allow OTA update from RC build to full release (#778)

## Summary

* Allow OTA update from RC build to full release
* If all the segments match, then also check if the current version
contains "-rc"

---

### AI Usage

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Did you use AI tools to help write this code? No

src/network/OtaUpdater.cpp

@@ -185,7 +185,16 @@ bool OtaUpdater::isUpdateNewer() const {
   /*
    * Check patch versions.
    */
-  return latestPatch > currentPatch;
+  if (latestPatch != currentPatch) return latestPatch > currentPatch;
+
+  // If we reach here, it means all segments are equal.
+  // One final check, if we're on an RC build (contains "-rc"), we should consider the latest version as newer even if
+  // the segments are equal, since RC builds are pre-release versions.
+  if (strstr(currentVersion, "-rc") != nullptr) {
+    return true;
+  }
+
+  return false;
 }
 
 const std::string& OtaUpdater::getLatestVersion() const { return latestVersion; }