fix for matrix used in test

Author: JacobBarthelmeh

.github/workflows/sftp-benchmark.yml

@@ -47,7 +47,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        wolfssl: ${{ fromJson(needs.create_matrix.outputs['versions']) }}
+        wolfssl: [ master ]
     name: Build and test wolfsshd
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10