Even if you ere told it cancelled it would be a tech.
Even if it was in the tutorial, instructions and necessary in single player it would be a tech.
Even if it DIDN'T cancel, and it was simply a faster movement option it would be a tech.
It's 100% tech.
A tech does not have to be hard.
A tech doesn't haven't to be totally, somewhat, or in any way illogical. On the contrary, most techs make sense once you have a full understanding of the game's mechanics. Even the janky/ "glitchy" ones.
Speaking of which a tech does not have to be a glitch, side effect or unintentional result of the engine, programming, etc.
A tech does not have to have complicated.
Of course that doesn't mean a tech can't be some or even all of these things, it just doesn't have to be.
Tech just means technique. As long as what you're doing is not a basic, single mechanic, but rather requires some sort of specific timing, strategy and/or technique and typically accomplishes something other than what that/those button(s)/mechanic(s) usually accomplish, it's a technique.