fix: Update DDS URL (#20)

Author: charmasaur

examples/export-a-dynamical-decoupling-sequence-to-cirq.ipynb

@@ -49,7 +49,7 @@
     "\n",
     "This section demonstrates how a DDS can be prepared, a corresponding quantum circuit made and executed on a `cirq` simulator.\n",
     "\n",
-    "Q-CTRL Open Controls defines a DDS as a set of instantaneous unitary operations performed at specific offset times, see the [technical documentation](https://docs.q-ctrl.com/control-library#dynamical-decoupling-sequences) for mathematical details.\n",
+    "Q-CTRL Open Controls defines a DDS as a set of instantaneous unitary operations performed at specific offset times, see the [technical documentation](https://docs.q-ctrl.com/open-controls/references/qctrl-open-controls/qctrlopencontrols/DynamicDecouplingSequence.html) for mathematical details.\n",
     "\n",
     "`cirq` implements quantum operations through a series of [gates](https://cirq.readthedocs.io/en/stable/gates.html). The standard way to create a quantum circuit is using `Circuit`. If a user wants to add pauses (in time) to a `Circuit` computation they can use identity gates. Alternatively, `cirq` provides `ScheduledOperation` that specifies an operation (application of a gate on one or more qubits) at a certain instant measured in ns or ps from the start of the sequence. A list of `ScheduledOperation` is collated by `Schedule`. Both `Circuit` and `Schedule` can be used in `Simulator` to simulate the circuit. We support both options through two methods: `convert_dds_to_cirq_circuit` and `covert_dds_to_cirq_schedule`.\n",
     "\n",
@@ -329,7 +329,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.7.10"
   },
   "toc": {
    "base_numbering": 1,