Improvements and bug fixed in Release workflow (#425)

* changed ubuntu to an older version, for compatibility reasons with glibc on pyinstaller steps and added a step to parse the release tag

* removed parsing of release tag

* changed flow name

* removed 'release' from the release name

.github/workflows/release.yml

@@ -4,12 +4,12 @@ on:
     tags:
     - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
     
-name: Upload Release Asset
+name: Release
 
 jobs:
   build:
     name: Upload Release Asset
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-16.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -36,10 +36,10 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
+          release_name: ${{ github.ref }}
           draft: false
           prerelease: false
-          
+
       - name: Upload Release Asset
         id: upload-release-asset 
         uses: actions/upload-release-asset@v1