bump dx in ci

Author: ealmloff

.github/workflows/nightly.yml

@@ -45,5 +45,5 @@ jobs:
       features: fullstack
       debug-symbols: false
       base-path: ${{ github.event.repository.name }}
-      dx-cli-version: 0.7.7
+      dx-cli-version: 0.7.9
       toolchain: nightly

.github/workflows/web.yml

@@ -25,4 +25,4 @@ jobs:
       features: fullstack
       debug-symbols: false
       base-path: ${{ github.event.repository.name }}
-      dx-cli-version: 0.7.7
+      dx-cli-version: 0.7.9