Updated README.md

Author: wavvves

docs/internal-developers/testing/releases/README.md

@@ -92,6 +92,7 @@ Every release includes specific testing instructions for new features and bug fi
     -   [8.5.1](./851.md)
 -   [8.6.0](./860.md)
 -   [8.7.0](./870.md)
+    -   [8.7.1](./871.md)
 
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