fix: fix typo in examples

exl/00_variables.fzs

@@ -5,7 +5,7 @@ str someString = "world, hello!";
 // 2. Change variable value:
 someString = "hello, world!";
 
-// Variables helps you store values to use it later
+// Variables help you store values to use it later
 int a = 2;
 int b = a + a * a;
 int c = a * b;
@@ -13,7 +13,7 @@ int c = a * b;
 printline("Now we got 12:");
 printline(c);
 
-// Also, there is many different types to help your program
+// Also, there are many different variable types to help your program
 //  work with many things:
 int signedInteger;
 uint unsignedInteger;

exl/01_conditions.fzs

@@ -1,5 +1,5 @@
 // When you need to check some value
-//  a conditional statements might help you
+//  a conditional statement might help you
 
 int valueToCheck = 2 + 2;
 if (valueToCheck == 4)
@@ -7,7 +7,7 @@ if (valueToCheck == 4)
   printline("Yay! 2 + 2 = 4");
 }
 
-// Conditional statement uses condition in pairs
+// Conditional statement uses condition in parenthesis
 //  after `if` keyword and executes command(s) after
 //  if condition turns out to be true
 
@@ -21,7 +21,7 @@ if (age <= 20)
 else
 {
   age = 20;
-  printline("You looks too young!");
+  printline("You look too young!");
 }
 
 // NOTE: If you need to execute only one statement