This change updates the ref used for the arduino_hal dependency to one
new enough to pick up the embedded-hal implementations that have taken
place since.
Alternatively, we could udpate to the the tip of main, which is
currently pointing to 8ad1be6d95b075d13bca611d177a4cc8b9896d77, but
the two commits in between only impact ravedude.
This change updates the ref used for the
arduino_hal
dependency to one new enough to pick up the embedded-hal implementations that have taken place since.