workflow: add ssl-socket-clientauth example

Author: ajaybhargav

.github/workflows/examples.yml

@@ -14,6 +14,7 @@ jobs:
           - "examples/adc-example"
           - "examples/socket-example"
           - "examples/ssl-socket-example"
+          - "examples/ssl-socket-clientauth"
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2