ci: Fix linux x86_64 publishing

.github/workflows/publish.yaml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - fix/linux-x86_64-publish
 
 env:
   PUB_CACHE: ~/.pub-cache
@@ -108,6 +109,7 @@ jobs:
             ${{ runner.os }}-pub-
       - name: Install dependencies
         run: |
+          sudo apt-get update
           sudo apt-get install \
             -y --no-install-recommends \
             clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev \