Update readme with new Jupyter notebooks

Correct FIRDamper docstring.

README.md

@@ -50,6 +50,8 @@ Examples
 Jupyter notebooks demonstrating mbtrack2 features are available in the example folder and can be opened online using google colab:
 + mbtrack2 base features [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_demo.ipynb)
 + dealing with RF cavities and longitudinal beam dynamics [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_cavity_resonator.ipynb)
++ collective effects [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_collective_effects.ipynb)
++ bunch by bunch feedback [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GamelinAl/mbtrack2_examples/blob/main/mbtrack2_BxB_FB.ipynb)
 
 References
 ----------

mbtrack2/tracking/feedback.py

@@ -79,7 +79,7 @@ class FIRDamper(Element):
         Gain of the FIR filter.
     phase : float
         Phase of the FIR filter in [degree].
-    meas_error : float, optional
+    bpm_error : float, optional
         RMS measurement error applied to the computed mean position.
         Unit is [m] if the plane is "x" or "y" and [s] if the plane is "s".
         The default is None.