Fix ubuntu version

.github/workflows/electron.yml

@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-16.04, macos-latest, windows-latest]
+        os: [ubuntu-18.04, macos-latest, windows-latest]
 
     steps:
       - name: Context
@@ -121,7 +121,7 @@ jobs:
       - name: Download ubuntu
         uses: actions/download-artifact@v1
         with:
-          name: ubuntu-16.04
+          name: ubuntu-18.04
       - name: Download windows
         uses: actions/download-artifact@v1
         with:
@@ -140,7 +140,7 @@ jobs:
           gpg --allow-secret-key-import --import gpg.key
           mkdir release
           cp windows-latest/* release/
-          cp ubuntu-16.04/* release/
+          cp ubuntu-18.04/* release/
           cp macos-latest/* release/
       - name: Sign binaries
         env: