Hola, code tier!
So, I'm gonna assume you're all somewhat techy types that might use Perforce or like to as their version control. Which I highly recommend btw, it's a lot more stable than git is with big files, and like... big binary files are most of gamedev. If you're not techy btw, I'd still recommend against git, and instead suggest you maybe just try Unity Collaborate? It doesn't have branching, which is death to coders, but for artist/designer types, especially tiny teams? It's honestly not bad.
Anyways! Let's move on assuming you're using Perforce. Here, a quick present:

Here it is in easy-copy format. Put that in a .bat file, and run it in your Perforce directory, and you'll get a changelog generated instantly! Change the default date if you just want to run it from Windows and have the file dumped, or, run it from command line with an argument like so:
make_changelog 2019/01/08
to get a changelog sweeping in all changes from that date to current date.
Handy, right? No big thing, just, handy! I don't know why that isn't something you can access in p4v's UI, but whatever, now you can just make a .bat file that double clicks and bam. Your testers will thank you.
EDIT: Wait it gets better. You can add this as a custom tool to p4v!




... and then it dumps the changelog.txt into the root of your project. As it stands, I don't know how to make it smart enough to dump into the root of whichever project you have selected, but I don't especially care. It's easy enough just to point it at whatever your current project is, or make a separate tool button for the other, right?
But DUDE! WE DID IT! We expanded P4v with a really handy tool! YAY!