Enable workflow check.

Author: tmpfs

.github/workflows/checks.yml

@@ -16,8 +16,8 @@ jobs:
       fail-fast: true
       matrix:
         include:
-          # - os: ubuntu-latest
-          #   binary_target: x86_64-unknown-linux-gnu
+          - os: ubuntu-latest
+            binary_target: x86_64-unknown-linux-gnu
           - os: windows-latest
             binary_target: x86_64-pc-windows-msvc
           - os: macos-latest-xl