chore: bump library.json version

fpistm · web-flow · commit f444101f80c6 · 2022-09-28T14:07:16.000+02:00
diff --git a/library.json b/library.json
@@ -7,7 +7,7 @@
     "type": "git",
     "url": "https://github.com/stm32duino/STM32LowPower"
   },
-  "version": "1.2.0",
+  "version": "1.2.1",
   "frameworks": "arduino",
   "platforms": "ststm32",
   "build": {
