Fix typo in comment (#398)

tasks.c

diff --git a/tasks.c b/tasks.c
index 895675f..bbe74b2 100644
--- a/tasks.c
+++ b/tasks.c
@@ -2140,7 +2140,7 @@
      * post in the FreeRTOS support forum before reporting this as a bug! -

      * https://goo.gl/wu4acr */

 

-    /* portSOFRWARE_BARRIER() is only implemented for emulated/simulated ports that

+    /* portSOFTWARE_BARRIER() is only implemented for emulated/simulated ports that

      * do not otherwise exhibit real time behaviour. */

     portSOFTWARE_BARRIER();