Increase version number and update changelog (#455)

Author: HKaras

VERSION

@@ -1 +1 @@
-v1.1.0
+v1.1.1

docsrc/source/changelog.rst

@@ -24,6 +24,11 @@ Release Notes
 - |fix| : Something which was not working as expected or leading to errors has been fixed.
 - |api| : This will require changes in your scripts or code.
 
+Release ``v1.1.1`` - August 2023
+------------------------------------------
+- |fix| : Fixes an error in the `FitResult.evaluate` function. (:pr:`454`)
+
+
 Release ``v1.1.0`` - August 2023
 ------------------------------------------
 - |api| : The definition of the dipolar time axis for RIDME has changed to match the one for 4-pulse DEER (:pr:`436`).