Fix typo in README for test instructions

Author: ESROAMER

tests/05_rtTDDFT/README

@@ -1,4 +1,4 @@
 In order to run these tests, you need to read ../integrate/Autotest.sh
 and set abacus directory in the file.
 To start running these rt-TDDFT (in LCAO basis) you just need to type:  
-../integrate/Autotst.sh
+../integrate/Autotest.sh