fix: S gate (#3868)

In "Utility-scale quantum computing", chapter "Quantum bits, gates, and
circuits"
(https://github.com/Qiskit/documentation/blob/main/learning/courses/utility-scale-quantum-computing/bits-gates-and-circuits.ipynb),
section "3.2 Single-qubit quantum state and unitary evolution",
paragraph 5, we have S = [1 0; 0 -i].

I think S should be [1 0; 0 i], instead. See
https://en.wikipedia.org/wiki/Quantum_logic_gate (section "Notable
examples", subsection "Phase shift gates", paragraph 2), or
https://github.com/Qiskit/documentation/blob/main/learning/courses/basics-of-quantum-information/single-systems/quantum-information.ipynb
(section "Unitary operations", subsection "Examples of unitary
operations on qubits", paragraph 1, item 3).

Author: tongkiat

learning/courses/utility-scale-quantum-computing/bits-gates-and-circuits.ipynb

@@ -615,7 +615,7 @@
     "\\end{bmatrix},\\quad\n",
     "S = \\begin{bmatrix}\n",
     "1 & 0 \\\\\n",
-    "0 & -i \\\\\n",
+    "0 & i \\\\\n",
     "\\end{bmatrix}, \\quad\n",
     "T = \\begin{bmatrix}\n",
     "1 & 0 \\\\\n",