Update README.md#16

StevenCostiou wants to merge 1 commit intomasterPharo-XP-Tools/DebuggingSpy:masterfrom

11-DSSpyInstrumenterTesttestInstrumentStPlayground-recompiles-the-method-open-does-not-set-the-modifiedClass-variable-properlyPharo-XP-Tools/DebuggingSpy:11-DSSpyInstrumenterTesttestInstrumentStPlayground-recompiles-the-method-open-does-not-set-the-modifiedClass-variable-properlyCopy head branch name to clipboard