copy IS_RELEASE condition so there must not be on every step the condition

.github/workflows/build.yml

@@ -267,18 +267,17 @@ jobs:
     runs-on: ubuntu-latest # does not matter which
     # a prerelase is created when pushing to master
     # a release is created when a tag will be set
-    # currently it is not supported to have access the env variable here
-    # therefore it has to be added to every step. 
-    # if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
+    # last condition is the same as IS_RELEASE,
+    # but environment variables cannot be used outside of steps
+    # so it was copied to here too
+    if: ${{ github.ref == 'refs/heads/master' || (github.event_name == 'push' && github.ref_type == 'tag' && startswith(github.ref_name, 'gittyup_v'))  }}
     steps:
       - name: Download artifacts
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         uses: actions/download-artifact@v2
         with:
           path: artifacts
 
       - name: list artifacts folder
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         run: |
           echo "Show artifacts folder:"
           ls artifacts
@@ -291,13 +290,11 @@ jobs:
     
       # version is exported from cmake to file
       - name: Retrieve version
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         run: |
           echo "::set-output name=VERSION::$(cat artifacts/Gittyup-VERSION/VERSION.txt)"
         id: version
 
       - name: Determine release title
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         uses: haya14busa/action-cond@v1
         id: release_title
         with:
@@ -306,7 +303,6 @@ jobs:
           if_false: 'Latest Build (Development)'
 
       - name: Determine release tag
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         uses: haya14busa/action-cond@v1
         id: release_tag
         with:
@@ -315,7 +311,6 @@ jobs:
           if_false: 'latest'
 
       - name: Update GitHub release
-        if: ${{ github.ref == 'refs/heads/master' || env.IS_RELEASE}}
         uses: marvinpinto/action-automatic-releases@latest
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}