Yeah, Mr. Reset is quite right. The socket LGA-1156 has been out of use for years. IIRC, there wasn't really a way to step that up in place anyway. A true upgrade would have required you to bump up to the triple channel RAM series LGA-2011 board. (And please, fact check this post, I'm working from fuzzy memories).
Were you to step up to a current line CPU, the board for that is LGA-1151, best for you would be an X-270 series. That's assuming we're not going to go whole hog with a 4 channel RAM monster
Basically you wouldn't be able to use much more than the case and maybe, (if you're feeling brave, or perhaps foolish)), the PSU.
The biggest up-tick in performance would be utilizing an M.2 PCIE Solid State Drive. The 270 boards have a dedicated slot for those. Any of your Adobe programs will launch in the matter of a couple seconds, I guarantee you'll be astounded!
But the downside is, you're going to have to spring for pretty much an entire new rig.
Besides, while it's a great money making deal for Intel, bumping up to another CPU with a couple extra MHz clock speed, it's rarely a satisfactory solution for someone who wants to increase work flow and throughput substantially. Oftentimes, with an Intel "K" suffix unlocked CPU, you might be able to squeeze and extra 500 Mhz Gig of clock out of it, perhaps a bunch more.
Sorry to be the bearer of good/bad news, but to the upside, these new i5-6xxx & i5-7xxx CPUs, along with DDR4, will eat that Linville rig alive.