Update .expected for 7-4

Author: jeongsoolee09

c/misra/test/rules/RULE-7-4/StringLiteralAssignedToNonConstChar.expected

@@ -1 +1,4 @@
-No expected results have yet been specified
+| char* function sample3 is returning a string literal. |
+| char* parameter of sample4 is passed a string literal. |
+| char* variable s3 is assigned a string literal.  |
+| char* variable s3 is declared with a string literal. |