doc: update README.md (#174)

The OSOR Award voting period is now over

Author: bfabio

README.md

@@ -36,7 +36,7 @@
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     📣 publiccode.yml is one of the 6 candidates for the OSOR Achievement Award 2023
-    👉 <a href="https://joinup.ec.europa.eu/collection/open-source-observatory-osor/osor-awards-2023">Cast your vote</a> 👈 
+    👉 <a href="https://joinup.ec.europa.eu/collection/open-source-observatory-osor/osor-awards-2023">Read more</a> 👈 
   </h3>
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