Hash: make actual SHA1 result and comment consistent (#5057)

fixes #3437

Author: yoursunny

libraries/Hash/examples/sha1/sha1.ino

@@ -5,21 +5,21 @@
 #include <Hash.h>
 
 void setup() {
-  Serial.begin(921600);
+  Serial.begin(115200);
 }
 
 void loop() {
 
   // usage as String
-  // SHA1:a94a8fe5ccb19ba61c4c0873d391e987982fbbd3
+  // SHA1:a9993e364706816aba3e25717850c26c9cd0d89d
 
   Serial.print("SHA1:");
   Serial.println(sha1("abc"));
 
   // usage as ptr
   // SHA1:a94a8fe5ccb19ba61c4c0873d391e987982fbbd3
   uint8_t hash[20];
-  sha1("abc", &hash[0]);
+  sha1("test", &hash[0]);
 
   Serial.print("SHA1:");
   for (uint16_t i = 0; i < 20; i++) {
@@ -29,4 +29,3 @@ void loop() {
 
   delay(1000);
 }
-