fix typo in Echnida manifest

Signed-off-by: AutomatedTester <dburns@mozilla.com>

echidna-manifest.txt

@@ -1,8 +1,7 @@
-# Manifest file for Echidna (automatic publication).
+# Manifest file for Echidna (automatic publication)
 webdriver-spec.html?specStatus=WD;shortName=webdriver respec
 bug-assist.js
 graphics/note1actions.svg
 graphics/note2actions.svg
 graphics/note3actions.svg
-graphcis/note4actions.svg
-
+graphics/note4actions.svg