Prepare to release 0.11.1 (#1030)

* Update changelog.

* Clearer changelog.

* Update version and release date in changelog.

CHANGELOG.md

@@ -1,5 +1,33 @@
 # Changelog
 
+## Version 0.11.1  (November 29th, 2021)
+
+### Summary
+
+This patch release fixes two bugs:
+
+- Bug: PEC could only be used with `cirq.Circuit`s, not `mitiq.QPROGRAM`, due to a missing conversion.
+    - Fix: PEC can now be used with any `mitiq.QPROGRAM` (gh-1018).
+- Bug: CDR classically simulated the wrong circuits when doing regression. 
+    - Fix: The correct circuits are now classically simulated (gh-1026).
+
+Also fixes a smaller bug where some tools in `mitiq.interface.mitiq_qiskit` modified `qiskit.QuantumCircuit`s when they shouldn't.
+
+### All Changes
+
+- Update scipy requirement from ~=1.7.1 to ~=1.7.2 (@dependabot, gh-1017)
+- CDR: Run the training circuits on the simulator (@rmlarose and @andreamari, gh-1026).
+- Update scipy requirement from ~=1.7.1 to ~=1.7.2 (@dependabot, gh-1017)
+- Update pydata-sphinx-theme requirement from ~=0.7.1 to ~=0.7.2 (@dependabot, gh-1024)
+- Update qiskit requirement from ~=0.31.0 to ~=0.32.0 (@dependabot, gh-1025)
+- Update pydata-sphinx-theme requirement from ~=0.7.1 to ~=0.7.2 (@dependabot, gh-1024)
+- [Bug fix] Avoid circuit mutation in qiskit executors (@andreamari, gh-1019)
+- [Bug fix] Add back-conversions in execute_with_pec (@andreamari, gh-1018) 
+- Increase shots in zne tests with shot_list (@andreamari, gh-1020)
+- Update pennylane requirement from ~=0.18.0 to ~=0.19.0 (@nathanshammah, gh-1022)
+- Add workflow figures and technique descriptions (@nathanshammah, gh-953)
+- Prepare to release 0.11.0 (@rmlarose, gh-1010)
+
 ## Version 0.11.0  (November 3rd, 2021)
 
 ### Summary

VERSION.txt

@@ -1 +1 @@
-0.11.0
+0.11.1