fix: update pyproject.toml version before building for TestPyPI

The workflow was setting VERSION env var but the build process reads
version from pyproject.toml. This caused dev versions (1.0.0.devXXX)
to be published as stable versions (1.0.0).

Now we update pyproject.toml with the calculated dev version before
building the package.

Author: fgogolli

.github/workflows/dev-pypi.yml

@@ -85,6 +85,13 @@ jobs:
       with:
         cache-key: deps-${{ needs.get-config.outputs.default-python-version }}-${{ hashFiles('.project.yml', 'pyproject.toml', 'requirements*.txt') }}
         fail-on-cache-miss: false
+    - name: Update version in pyproject.toml
+      run: |
+        # Update version in pyproject.toml for dev builds
+        sed -i "s/^version = .*/version = \"$VERSION\"/" pyproject.toml
+        echo "Updated pyproject.toml version to: $VERSION"
+        grep "^version = " pyproject.toml
+
     - name: Build package
       run: |
         make build