Add release note

doc/release_notes.rst

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 * In alternative clustering, generate hydro inflows by shape and avoid hydro inflows duplication for plants installed in the same node `PR #1120 <https://github.com/pypsa-meets-earth/pypsa-earth/pull/1120>`
 
+* Support of Linopy for Power and Sector-Coupled Modelling and latest PyPSA version `PR #1172 <https://github.com/pypsa-meets-earth/pypsa-earth/pull/1172>`__
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+* Update workflow to geopandas >= 1.0 `PR #1276 <https://github.com/pypsa-meets-earth/pypsa-earth/pull/1276>`__
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 **Minor Changes and bug-fixing**
 
 * Prevent computation of powerplantmatching if replace option is selected for custom_powerplants `PR #1281 <https://github.com/pypsa-meets-earth/pypsa-earth/pull/1281>`__