Remove ThingSpeak references from README and index.html comment

- README: IoT label, repo table description, and config snippet
  all updated to use generic 'ioT Server' / 'WRITE_API_KEY' wording
- index.html: code comment now says 'API cap' instead of 'ThingSpeak cap'

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: i6mods

README.md

@@ -66,7 +66,7 @@ The dashboard displays real-time CPM and µSv/h readings with interactive time-r
 MCU   : ESP32-C3 Super Mini
 Tube  : SBM-20 Geiger-Müller Tube
 Factor: 0.0057 µSv/h per CPM
-IoT   : ThingSpeak (field1 = CPM, field2 = µSv/h)
+IoT   : ioT Server (field1 = CPM, field2 = µSv/h)
 Power : USB-C
 ```
 
@@ -81,7 +81,7 @@ The ESP32-C3 reads pulses from the SBM-20 tube, calculates CPM and µSv/h, then
 | `index.html` | Live dashboard — hosted via GitHub Pages |
 | `geigerduino_xiao_esp32c3/` | Firmware for XIAO ESP32-C3 |
 | `geigerduino_esp32c3_supermini/` | Firmware for ESP32-C3 Super Mini |
-| `geigerduino2_thingspeak/` | ThingSpeak variant firmware |
+| `geigerduino2_thingspeak/` | IoT server variant firmware |
 | `XIAO_ESP32C3_SETUP_REFERENCE.txt` | Wiring & board setup notes |
 
 ---
@@ -93,7 +93,7 @@ Open the firmware `.ino` file and set your credentials:
 ```cpp
 const char* ssid     = "YOUR_WIFI_SSID";
 const char* password = "YOUR_WIFI_PASSWORD";
-const char* apiKey   = "YOUR_THINGSPEAK_WRITE_KEY";
+const char* apiKey   = "YOUR_WRITE_API_KEY";
 ```
 
 In `index.html`, update the channel and read key:

index.html

@@ -604,7 +604,7 @@ <h3>☢ <span>Dose Rate</span> — µSv/h</h3>
         //                 gaps in data could make "1 Hour" show several hours)
         // days=1       → 2,880 pts at 30s intervals, well under 8,000 cap ✓
         // days=7&average=60   → hourly averages = 168 pts (days=7 alone = 20,160
-        //                        pts, over ThingSpeak's 8,000 cap → only ~2.7 days shown)
+        //                        pts, over the 8,000 pt API cap → only ~2.7 days shown)
         // days=30&average=1440 → daily averages = 30 pts (avoids cap entirely)
         '1h':  { param: 'minutes=60',              label: '1 Hour' },
         '24h': { param: 'days=1',                  label: '24 Hours' },