[doc] introduce CHANGELOG file#80

Grolleau-Benjamin wants to merge 2 commits intoSTMicroelectronics:dev/1.2.0STMicroelectronics/STSELib:dev/1.2.0from

Grolleau-Benjamin:dev/1.2.0Grolleau-Benjamin/STSELib:dev/1.2.0Copy head branch name to clipboard