Fix typo in data_utils.py

TrivialFix

Change-Id: I2b548606af85fc0b836f647aa6e97f7fcb01e9bd
diff --git a/tempest/lib/common/utils/data_utils.py b/tempest/lib/common/utils/data_utils.py
index 70be40c..8910927 100644
--- a/tempest/lib/common/utils/data_utils.py
+++ b/tempest/lib/common/utils/data_utils.py
@@ -153,7 +153,7 @@
 
     This generates a string with an arbitrary number of characters, generated
     by looping the base_text string. If the size is smaller than the size of
-    base_text, returning string is shrinked to the size.
+    base_text, returning string is shrunk to the size.
     :param int size: a returning characters size
     :param str base_text: a string you want to repeat
     :return: size string