Update adventure and fix command perm serialization NPE (#6729)

patches/api/Adventure.patch

@@ -14,7 +14,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      withJavadocJar()
  }
  
-+val adventureVersion = "4.9.1"
++val adventureVersion = "4.9.2"
 +val apiAndDocs by configurations.creating {
 +    attributes {
 +        attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.DOCUMENTATION))
@@ -1258,7 +1258,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @Deprecated // Paper
      public String getPermissionMessage() {
 -        return permissionMessage;
-+        return io.papermc.paper.text.PaperComponents.legacySectionSerializer().serialize(permissionMessage); // Paper
++        return io.papermc.paper.text.PaperComponents.legacySectionSerializer().serializeOrNull(permissionMessage); // Paper
      }
  
      /**
@@ -1281,10 +1281,20 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          return this;
      }
 +    // Paper start
++    /**
++     * Gets the permission message.
++     *
++     * @return the permission message
++     */
 +    public @Nullable net.kyori.adventure.text.Component permissionMessage() {
 +        return this.permissionMessage;
 +    }
 +
++    /**
++     * Sets the permission message.
++     *
++     * @param permissionMessage the permission message
++     */
 +    public void permissionMessage(@Nullable net.kyori.adventure.text.Component permissionMessage) {
 +        this.permissionMessage = permissionMessage;
 +    }