Fix typo in test documentation

Change-Id: If779915531e6431f018663ce87964fb07741b2fa
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/redfish_request.robot b/lib/redfish_request.robot
index 834feef..4e66c5c 100644
--- a/lib/redfish_request.robot
+++ b/lib/redfish_request.robot
@@ -3,7 +3,7 @@
 Documentation     Redfish request library which provide keywords for creating session,
 ...               sending POST, PUT, DELETE, PATCH, GET etc. request using redfish_request.py
 ...               library file. It also contain other keywords which uses redfish_request.py
-...               libarary infrastructure.
+...               library infrastructure.
 
 Resource          openbmc_ffdc.robot
 Resource          bmc_redfish_resource.robot