Update CI triggers and fix powershell variable syntax

Author: jackpot51

.github/workflows/ci.yml

@@ -1,5 +1,11 @@
 name: CI
-on: [push, pull_request]
+on:
+  push:
+    branches: '**'
+    tags-ignore: '**'
+  pull_request:
+  release:
+    types: [published]
 jobs:
     build:
         runs-on: windows-latest
@@ -16,7 +22,7 @@ jobs:
                   SSL_COM_CREDENTIAL_ID: ${{ github.event_name == 'release' && secrets.SSL_COM_CREDENTIAL_ID || '' }}
                   SSL_COM_TOTP_SECRET: ${{ github.event_name == 'release' && secrets.SSL_COM_TOTP_SECRET || '' }}
                   SIGN: ${{ github.event_name == 'release' && '--sign' || '' }}
-              run: python build.py %SIGN%
+              run: python build.py $SIGN
             - uses: actions/upload-artifact@v2
               with:
                   name: thelio-io