fix yaml syntax

Signed-off-by: Karl W Schulz <karl.schulz@amd.com>

.github/workflows/mi100.yml

@@ -46,7 +46,7 @@ jobs:
           echo "PATH=$PATH"
           echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
           echo "ROCM_PATH=$ROCM_PATH"
-	  ulimit -u
+          ulimit -u
       - name: Configure
         run: |
           mkdir build