Fix a typo in two samples (#885)

I changed `ranndom` to `random` in both files.

Author: quackduck

samples/algorithms/DeutschJozsa.qs

@@ -15,7 +15,7 @@ namespace Sample {
 
     @EntryPoint()
     operation Main() : (String, Bool)[] {
-        // A Boolean function is a function that maps bits trings to a bit:
+        // A Boolean function is a function that maps bitstrings to a bit:
         //     𝑓 : {0, 1}^n → {0, 1}.
 
         // We say that 𝑓 is constant if 𝑓(𝑥⃗) = 𝑓(𝑦⃗) for all bitstrings 𝑥⃗ and

samples/algorithms/DeutschJozsaNISQ.qs

@@ -13,7 +13,7 @@ namespace Sample {
 
     @EntryPoint()
     operation Main() : (Result[], Result[]) {
-        // A Boolean function is a function that maps bits trings to a bit:
+        // A Boolean function is a function that maps bitstrings to a bit:
         //     𝑓 : {0, 1}^n → {0, 1}.
 
         // We say that 𝑓 is constant if 𝑓(𝑥⃗) = 𝑓(𝑦⃗) for all bitstrings 𝑥⃗ and

samples/algorithms/QRNG.qs

@@ -2,7 +2,7 @@
 /// Quantum Random Number Generator
 ///
 /// # Description
-/// This program implements a quantum ranndom number generator by setting qubits
+/// This program implements a quantum random number generator by setting qubits
 /// in superposition and then using the measurement results as random bits.
 namespace Sample {
     open Microsoft.Quantum.Convert;

samples/algorithms/QRNGNISQ.qs

@@ -2,7 +2,7 @@
 /// Quantum Random Number Generator
 ///
 /// # Description
-/// This program implements a quantum ranndom number generator by setting qubits
+/// This program implements a quantum random number generator by setting qubits
 /// in superposition and then using the measurement results as random bits.
 namespace Sample {
     open Microsoft.Quantum.Measurement;