build: fix Node.js 0.6 build

Author: dougwilson

.github/workflows/ci.yml

@@ -129,6 +129,7 @@ jobs:
       shell: bash -eo pipefail -l {0}
       run: |
         if [[ "${{ matrix.node-version }}" == 0.6* ]]; then
+          sudo apt-get update
           sudo apt-get install g++-4.8 gcc-4.8 libssl1.0-dev
           export CC=/usr/bin/gcc-4.8
           export CXX=/usr/bin/g++-4.8