Replace Quansight logo by CZI one in Readme

MANIFEST.in

@@ -1,7 +1,6 @@
 include scripts/*
 include img_src/*.ico
 include img_src/spyder.png
-include img_src/oxygen_icon_set/*
 include MANIFEST.in
 include README.md
 include LICENSE.txt

README.md

@@ -219,8 +219,7 @@ The rest our dependencies (both required and optional) are declared in
 
 Spyder is funded thanks to the generous support of
 
-
-[![Quansight](https://user-images.githubusercontent.com/16781833/142477716-53152d43-99a0-470c-a70b-c04bbfa97dd4.png)](https://www.quansight.com/)[![Numfocus](https://i2.wp.com/numfocus.org/wp-content/uploads/2017/07/NumFocus_LRG.png?fit=320%2C148&ssl=1)](https://numfocus.org/)
+[![Chan Zuckerberg Initiative](https://raw.githubusercontent.com/spyder-ide/spyder/master/img_src/czi.png)](https://chanzuckerberg.com/)[![Numfocus](https://i2.wp.com/numfocus.org/wp-content/uploads/2017/07/NumFocus_LRG.png?fit=320%2C148&ssl=1)](https://numfocus.org/)
 
 
 and the donations we have received from our users around the world through [Open Collective](https://opencollective.com/spyder/):