Clarify compressor build instructions for x86_64 Windows

Author: fenhl

bin/Compress/README.md

@@ -14,7 +14,7 @@ $ clang -pthread bin/Compress/src/compressor.c -o bin/Compress/Compress_ARM64.ex
 
 # Windows (x86_64)
 
-In `mingw64`, run:
+In `mingw64` (`~\scoop\apps\msys2\current\mingw64.exe` if installed via `scoop install msys2`), run:
 
 ```bash
 gcc bin/Compress/src/compressor.c -o bin/Compress/Compress.exe

version.py

@@ -1,7 +1,7 @@
 __version__ = '8.3.68'
 
 # This is a supplemental version number for branches based off of main dev.
-supplementary_version = 2
+supplementary_version = 3
 
 # Pick a unique identifier byte for your fork if you are intending to have a long-lasting branch.
 # This will be 0x00 for main releases and 0x01 for main dev.