Update code inlining instructions

Author: DerGuteMoritz

.github/PULL_REQUEST_TEMPLATE.md

@@ -4,7 +4,7 @@ by checking the relevant checkboxes):
 - [ ] The commits are consistent with our [contribution guidelines](./CONTRIBUTING.md)
 - [ ] You've added tests (if possible) to cover your change(s)
 - [ ] All tests are passing (run `lein do clean, test`)
-- [ ] Code inlining with mranderson works and tests pass with inlined code (run `./build.sh install` -- takes a long time)
+- [ ] Code inlining with mranderson works and tests pass with inlined code (run `make install` -- takes a long time)
 - [ ] You've updated the changelog (if adding/changing user-visible functionality)
 - [ ] You've updated the readme (if adding/changing user-visible functionality)