📝 Fix image links for sponsors (#2304)

README.md

@@ -47,7 +47,7 @@ The key features are:
 
 <!-- sponsors -->
 
-<a href="https://www.deta.sh/?ref=fastapi" target="_blank" title="The launchpad for all your (team's) ideas"><img src="/img/sponsors/deta.svg"></a>
+<a href="https://www.deta.sh/?ref=fastapi" target="_blank" title="The launchpad for all your (team's) ideas"><img src="https://fastapi.tiangolo.com/img/sponsors/deta.svg"></a>
 
 <!-- /sponsors -->
 

docs/en/data/sponsors.yml

@@ -1,8 +1,8 @@
 gold:
   - url: https://www.deta.sh/?ref=fastapi
     title: The launchpad for all your (team's) ideas
-    img: /img/sponsors/deta.svg
+    img: https://fastapi.tiangolo.com/img/sponsors/deta.svg
 silver:
   - url: https://testdriven.io/
     title: Learn to build high-quality web apps with best practices
-    img: /img/sponsors/testdriven.svg
+    img: https://fastapi.tiangolo.com/img/sponsors/testdriven.svg