updated buildkite.yaml

Author: HariSekhon

.github/workflows/buildkite.yaml

@@ -78,14 +78,14 @@ jobs:
     container: buildkite/agent:ubuntu
     steps:
       - name: Linux Release
-        if: runner.os == Linux
+        if: runner.os == 'Linux'
         run: |
           [ -e /.dockerenv ] && ls -l /.dockerenv
           echo
           cat /etc/*-release
 
       - name: Linux Hardware
-        if: runner.os == Linux
+        if: runner.os == 'Linux'
         run: |
           set +x
           echo -n "CPUs: "