Point the config at 0.2.6

Android refuses an APK whose versionCode is not greater than the
installed one, and 0.2.5 is on the tablet. 1000 + major*10000 +
minor*100 + patch puts 0.2.6 at 1206.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "BikeControl",
-  "version": "0.2.5",
+  "version": "0.2.6",
   "identifier": "paris.tourolle.bikecontrol",
   "build": {
     "frontendDist": "../ui/dist",
@@ -43,7 +43,7 @@
     ],
     "category": "Utility",
     "android": {
-      "versionCode": 1205
+      "versionCode": 1206
     },
     "shortDescription": "Indoor cycling trainer control",
     "longDescription": "Control a smart trainer over BLE, ride gradient profiles and synthetic waveforms, and record the result."