Merge pull request #8844 from jeromecoutant/PR_HTML

STM32 : Remove html release notes files

Author: Cruz Monrreal

targets/TARGET_STM/README.md

@@ -0,0 +1,23 @@
+## README for mbed-os STM32 targets
+
+### MBED Uncyclo pages
+
+https://os.mbed.com/teams/ST/wiki/
+
+### STM32 Cube
+
+https://www.st.com/en/embedded-software/stm32cube-mcu-packages.html
+
+This table summarizes the STM32Cube versions currently used :
+
+| STM32 Serie | Cube version |
+|-------------|--------------|
+| F0          |    1.9.0     |
+| F1          |    1.6.1     |
+| F2          |    1.6.0     |
+| F3          |    1.9.0     |
+| F4          |    1.19.0    |
+| F7          |    1.10.0    |
+| L0          |    1.10.0    |
+| L1          |    1.8.1     |
+| L4          |    1.11.0    |