Fix Typo

doc/html/bluegene.shtml

@@ -71,7 +71,7 @@ have, for instance, the 4th nodeboard populated instead of the 1st.
 <p>The normal set of SLURM user tools: <i>sbatch</i>, <i>scancel</i>,
 <i>sinfo</i>, <i>squeue</i>, and <i>scontrol</i> provide all of the expected
 services except support for job steps, which is detailed later.
-The sstat command is not supported on Cray systems.</p>
+The sstat command is not supported on BlueGene systems.</p>
 
 <p>Seven job submission options are available exclusively on BlueGene systems:</p>
 <table>