fix(version): splash screen showed 1.17, not the actual 1.17.1 upstream base

release-notes.md's v1.25 section already documents "Updated upstream
base to companion-v1.17.1", and that merge (68527e7b) is confirmed in
main's history -- but every MESHCORE_VERSION string, including
UITask.cpp's fallback default for boards that don't set it explicitly
(Heltec v3/v4, ThinkNode, Mesh Pocket, T-Echo), was still hardcoded to
the pre-bump "1.17". Bumped every occurrence to "1.17.1" to match what
actually shipped.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

variants/wio-tracker-l1-eink/platformio.ini

@@ -35,7 +35,7 @@ build_flags = ${nrf52_base.build_flags}
   -D PIN_BUZZER=12
   -D QSPIFLASH=1
   -D FIRMWARE_SOLO_BUILD=1
-  -D MESHCORE_VERSION='"1.17"'
+  -D MESHCORE_VERSION='"1.17.1"'
   -D UI_SENSORS_PAGE=1
   -D BLE_PIN_CODE=123456
 build_src_filter = ${nrf52_base.build_src_filter}