fix misspell "compatibility" in script/ci

Signed-off-by: fate-grand-order <[email protected]>

script/ci

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Backwards compatiblity for jenkins
+# Backwards compatibility for jenkins
 #
 # TODO: remove this script after all current PRs and jenkins are updated with
 # the new script/test/ci change