Change coord name from x to channel in plot_channel_contribution_share_hdi plot

[wd60622]

The plot_channel_contribution_share_hdi displays x for each forest plot. I believe the coord name can be change to channel to solve this.

Reference:

• Source code:

  pymc-marketing/pymc_marketing/mmm/base.py

  Lines 1152 to 1182 in 94a8096

  	def plot_channel_contribution_share_hdi(
  	self, hdi_prob: float = 0.94, **plot_kwargs: Any
  	) -> plt.Figure:
  	"""Plot the share of channel contributions in a forest plot.
  	Parameters
  	----------
  	hdi_prob : float, optional
  	HDI value to be displayed, by default 0.94
  	**plot_kwargs
  	Additional keyword arguments to pass to `az.plot_forest`.
  	Returns
  	-------
  	plt.Figure
  	"""
  	channel_contributions_share: DataArray = (
  	self._get_channel_contributions_share_samples()
  	)
  	ax, *_ = az.plot_forest(
  	data=channel_contributions_share,
  	combined=True,
  	hdi_prob=hdi_prob,
  	**plot_kwargs,
  	)
  	ax.xaxis.set_major_formatter(mtick.FuncFormatter(lambda y, _: f"{y: 0.0%}"))
  	fig: plt.Figure = plt.gcf()
  	fig.suptitle("channel Contribution Share", fontsize=16, y=1.05)
  	return fig

• Example plot: https://www.pymc-marketing.io/en/stable/notebooks/mmm/mmm_case_study.html#return-on-ads-spend-roas