doc : minor edit in Acknowledgments links

README.md

@@ -499,7 +499,7 @@ PyCM can be used online in interactive Jupyter Notebooks via the Binder or Colab
 
 [NLnet foundation](https://nlnet.nl) has supported the PyCM project from version **3.6** to **4.0** through the [NGI Assure](https://nlnet.nl/assure) Fund. This fund is set up by [NLnet foundation](https://nlnet.nl) with funding from the European Commission's [Next Generation Internet program](https://ngi.eu), administered by DG Communications Networks, Content, and Technology under grant agreement [**No 957073**](https://nlnet.nl/project/PyCM/).
 
-<a href="https://nlnet.nl"><img src="Otherfiles/NlNet.svg" height="50px" alt="NLnet foundation"></a> &nbsp;  <a href="https://nlnet.nl/assure"><img src="Otherfiles/NGIAssure.svg" height="50px" alt="NGI Assure"></a>
+<a href="https://nlnet.nl"><img src="https://github.com/sepandhaghighi/pycm/raw/master/Otherfiles/NlNet.svg" height="50px" alt="NLnet foundation"></a> &nbsp;  <a href="https://nlnet.nl/assure"><img src="https://github.com/sepandhaghighi/pycm/raw/master/Otherfiles/NGIAssure.svg" height="50px" alt="NGI Assure"></a>
 
 ## References