fix: clear session disconnect timeout on Chromecast Tech dispose

[ksjun]

Because the timer was not cleared even after ChromeTech was dispose.

[yokuze]

This looks good, thank you @ksjun. Could you adjust the commit message to the format described here: https://github.com/silvermine/silvermine-info/blob/master/commit-history.md#commit-messages ?

Something like:

fix: prevent session timeout disconnect after reconnecting

should work. Thanks!

[yokuze]

Sorry @ksjun - You'll have to fixup the commit message itself using git commit --amend, not just the MR title. Thank you!