Update readme.md

Add information for using Mill with Windows

readme.md

@@ -35,13 +35,21 @@ Boogie program verifier finished with 4 verified, 0 errors
 
 The tool takes as inputs either a BAP ADT file (here denoted with `.adt`) or a `.gts` file produced by [gtirb-semantics](https://github.com/UQ-PAC/gtirb-semantics), as well as a file containing the output of readelf (here denoted with `.relf`), both created from the same AArch64/ARM64 binary, and outputs a semantically equivalent .bpl Boogie-language source file. The default output file is `boogie_out.bpl`, but the output location can be specified.
 
-To build and run the tool using sbt, use the following command:
+To build and run the tool use one of the the following commands:
 
-`sbt "run --input file.{adt, gts} --relf file.relf [--spec file.spec] [--output output.bpl] [--analyse] [--interpret]"` where the output filename is optional and specification filenames are optional. The specification filename must end in `.spec`.
-
-or mill:
-
-`mill run --input file.adt --relf file.relf [--spec file.spec] [--output output.bpl] [--analyse] [--interpret]`.
+sbt:
+```
+sbt "run --input file.{adt, gts} --relf file.relf [--spec file.spec] [--output output.bpl] [--analyse] [--interpret]"
+```
+mill (Mac OS X / Linux):
+```
+./mill run --input file.adt --relf file.relf [--spec file.spec] [--output output.bpl] [--analyse] [--interpret]
+```
+mill (Windows): 
+```
+./mill.bat run --input file.adt --relf file.relf [--spec file.spec] [--output output.bpl] [--analyse] [--interpret]
+```
+The output filename is optional and specification filenames are optional. The specification filename must end in `.spec`.
 
 #### Usage
 
@@ -82,9 +90,14 @@ See [docs/development](docs/development)
 2. Install [boogie](/docs/development/tool-installation.md)
 3. To a single system test case :
 
+Mac OS X / Linux: 
 ```
 ./mill test.testOnly '*SystemTests*' -- -z secret_write -z secret_write 
 ```
+Windows:
+```
+./mill.bat test.testOnly '*SystemTests*' -- -z secret_write -z secret_write 
+```
 
 ## Open Source License