readme: icon update

README.md

@@ -2,12 +2,9 @@
 [![PyPI](https://img.shields.io/pypi/v/miniff)](https://pypi.org/project/miniff/)
 [![Test coverage](https://gitlab.kwant-project.org/qt/miniff/badges/master/coverage.svg)](https://pypi.org/project/miniff/)
 
-miniff: a minimal implementation of neural-network force fields
-===============================================================
+# ![icon](images/icon-full.svg)
 
-Compute energies and forces of atomic systems with neural networks.
-
-![image](images/atomic-structure.svg)
+miniFF: a minimal implementation of neural-network force fields. Compute energies and forces of atomic systems with neural networks.
 
 About
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