Fix type in hashes/adler32.py

Author: barklan

hashes/adler32.py

@@ -9,7 +9,7 @@
 """
 
 
-def adler32(plain_text: str) -> str:
+def adler32(plain_text: str) -> int:
     """
     Function implements adler-32 hash.
     Itterates and evaluates new value for each character