notes: modify the release notes

Author: finozzifa

docs/release_notes.rst

@@ -46,6 +46,8 @@ Upcoming Release
 
 * Adds a Makefile (https://github.com/PyPSA/technology-data/pull/204)
 
+* Adds rounding for the value column of the csv files produced by compile_cost_assumptions_usa (https://github.com/PyPSA/technology-data/pull/206)
+
 `v0.11.0 <https://github.com/PyPSA/technology-data/releases/tag/v0.11.0>`__ (24th January 2025)
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