binman: Rename testCbfsNoCOntents()

Use a lower-case O as was intended.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 3982560..0f4330b 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -2251,7 +2251,7 @@
             self._DoReadFile('107_cbfs_no_size.dts')
         self.assertIn('entry must have a size property', str(e.exception))
 
-    def testCbfsNoCOntents(self):
+    def testCbfsNoContents(self):
         """Test handling of a CBFS entry which does not provide contentsy"""
         with self.assertRaises(ValueError) as e:
             self._DoReadFile('108_cbfs_no_contents.dts')