Update documentation & more test coverage

Update version information in documentation.

Small editorial edit: add a space.

More build test coverage.

Author: syncom

Diff for: .github/workflows/build-libg2hec.yml

@@ -30,4 +30,4 @@ jobs:
         run: |
           cd ${{ github.workspace }}
           autoreconf -vi
-          ./scripts/build.sh 
+          ./scripts/build.sh distcheck

Diff for: .github/workflows/release.yml

@@ -33,5 +33,5 @@ jobs:
         uses: ncipollo/release-action@v1
         with:
           allowUpdates: true
-          artifacts: "g2hec-lib-${{ env.RELEASE_VERSION}}.tar.gz"
+          artifacts: "g2hec-lib-${{ env.RELEASE_VERSION }}.tar.gz"
           token: ${{ secrets.GITHUB_TOKEN }}