Update submodule to publish the new PSR-17 errata

Jean85 · Jean85 · commit 54b0f044e4f3 · 2024-05-10T09:35:48.000+02:00
diff --git a/source/_includes/fig-standards b/source/_includes/fig-standards
@@ -1 +1 @@
-Subproject commit 7c31a6bd4376cd19dd993e9280955b02d1ea7553
+Subproject commit 8639a87734b7b193377a8ee6d9800d189bbb05f7
