ci: run apt update before toolchain installation

Author: Brooooooklyn

.github/workflows/ci.yaml

@@ -63,11 +63,13 @@ jobs:
           - host: ubuntu-latest
             target: 'aarch64-unknown-linux-gnu'
             setup: |
+              sudo apt-get update
               sudo apt-get install g++-aarch64-linux-gnu gcc-aarch64-linux-gnu -y
             build: npx lerna exec "yarn build --target aarch64-unknown-linux-gnu" --concurrency 1 --stream --no-prefix
           - host: ubuntu-latest
             target: 'armv7-unknown-linux-gnueabihf'
             setup: |
+              sudo apt-get update
               sudo apt-get install gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf -y
             build: npx lerna exec "yarn build --target armv7-unknown-linux-gnueabihf" --concurrency 1 --stream --no-prefix
           - host: ubuntu-latest