Update release patch number

Author: dpiparo

core/foundation/inc/ROOT/RVersion.hxx

@@ -4,7 +4,7 @@
 /* Update on release: */
 #define ROOT_VERSION_MAJOR 6
 #define ROOT_VERSION_MINOR 32
-#define ROOT_VERSION_PATCH 20
+#define ROOT_VERSION_PATCH 21
 #define ROOT_RELEASE_DATE "Nov 25 2025"
 
 /* Don't change the lines below. */