github workflow: build_setup: employ shell script with GITHUB_WORKSPACE

.github/setup.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+cat ../README.md | grep '^# IMCtermite' -A 50000 > ../python/README.md
+cp -r ../lib ../python/
+cp -v ../LICENSE ../python/

.github/workflows/pypi-deploy.yml

@@ -12,7 +12,9 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Prepare files
-        run: python/setup.sh
+        run: |
+          chmod +x "${GITHUB_WORKSPACE}/.github/setup.sh"
+          "${GITHUB_WORKSPACE}/.github/setup.sh"
 
   build_wheels:
     name: Build binary wheels on ${{ matrix.os }}

python/setup.sh

@@ -1,5 +0,0 @@
-#!/bin/bash
-
-cat README.md | grep '^# IMCtermite' -A 50000 > python/README.md
-cp -r lib python/
-cp -v LICENSE python