Update README.md for v0.9.4

EHU32 v0.9.3

Extended message filtering, added a task to look for Aux string
Tweaked timings once again
Improved ISO 15765-2 compatibility

EHU32 v0.9.2

Increased stability in measurement modes, the messages are now sent less frequently
Added a watchdog task, reset by radio messages
Extended time before automatic AC macro kicks in after entering the AC menu

EHU32 v0.9.1

Changes:
- automatic reconnect works again
- removed local volume control from Bluetooth A2DP

Update README.md for v0.9

EHU32 v0.8

Now blocks "Aux" messages with high accuraccy by abusing ISO 15765-2 flow control
Tweaked timings

EHU32 v0.7

Added proper conversion to UTF-16, audio metadata containing accented characters is now supported*
Switched from delay to vTaskDelay
Extended the RX buffer to catch more events, seems to have no ill effects

*various displays may not support some extended latin characters, thus some strings may not be displayed in full - in such cases all the text coming after "unrecognized" letter is not shown at all

Add files via upload

Update README.md