Fix OG generation on Java 25

Pin SnakeYAML to the version used by the site generator so content deployments can regenerate and publish the current pattern count.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: eb75e4d7-cc87-4e76-ac2a-0de0f568a6a6

Author: brunoborges

html-generators/generateog.java

@@ -2,6 +2,7 @@
 //JAVA 25
 //DEPS com.fasterxml.jackson.core:jackson-databind:2.18.3
 //DEPS com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.18.3
+//DEPS org.yaml:snakeyaml:2.4
 //SOURCES og/Palette.java
 //SOURCES og/Layout.java
 //SOURCES og/ContentLoader.java