refactor: merge continuous-releases workflow into continuous-builds

Author: azubieta

.github/workflows/continuous-builds.yml

@@ -51,4 +51,20 @@ jobs:
         uses: actions/upload-artifact@v2.1.4
         with:
           name: bash
-          path: './bash*.AppImage*'
+          path: './bash*.AppImage*'
+  upload-continuous-releases:
+    runs-on: ubuntu-20.04
+    needs: test
+    if: github.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/checkout@v2
+      - name: Download AppImage from build job
+        uses: actions/download-artifact@v2
+        with:
+          name: appimage-builder
+      - uses: "marvinpinto/action-automatic-releases@latest"
+        with:
+          repo_token: "${{ secrets.GITHUB_TOKEN }}"
+          prerelease: true
+          automatic_release_tag: Continuous
+          files: './appimage-builder*.AppImage*'