Update platformio/ststm32 to v19.7.0 (#10816)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

variants/stm32/stm32.ini

@@ -2,7 +2,7 @@
 extends = arduino_base
 platform =
   # renovate: datasource=custom.pio depName=platformio/ststm32 packageName=platformio/platform/ststm32
-  platformio/ststm32@19.6.0
+  platformio/ststm32@19.7.0
 platform_packages =
   # renovate: datasource=github-tags depName=Arduino_Core_STM32 packageName=stm32duino/Arduino_Core_STM32
   platformio/framework-arduinoststm32@https://github.com/stm32duino/Arduino_Core_STM32/archive/2.10.1.zip