Update to Ruby 3.2.3

Drop `fix-ruby-xfree-for-libxml2.patch` since this now ships with
Ruby 3.2.3. This matches the change in
https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/7364.

This is needed to make Omnibus builds work:
https://gitlab.com/gitlab-org/gitlab/-/issues/438816

patches/ruby/3.2/fix-ruby-xfree-for-libxml2.patch

@@ -1,23 +0,0 @@
-diff --git a/gc.c b/gc.c
-index 54400e4f6b..96d43ac8ac 100644
---- a/gc.c
-+++ b/gc.c
-@@ -12614,8 +12614,16 @@ ruby_xrealloc2_body(void *ptr, size_t n, size_t size)
- void
- ruby_sized_xfree(void *x, size_t size)
- {
--    if (x) {
--        objspace_xfree(&rb_objspace, x, size);
-+    if (LIKELY(x)) {
-+        /* It's possible for a C extension's pthread destructor function set by pthread_key_create
-+         * to be called after ruby_vm_destruct and attempt to free memory. Fall back to mimfree in
-+         * that case. */
-+        if (LIKELY(GET_VM())) {
-+            objspace_xfree(&rb_objspace, x, size);
-+        }
-+        else {
-+            ruby_mimfree(x);
-+        }
-     }
- }
- 

patches/ruby/mandatory_patches

@@ -1,2 +1 @@
 thread-memory-allocations
-fix-ruby-xfree-for-libxml2

scripts/lib/custom-docker-build

@@ -235,8 +235,8 @@ function print_ruby_args() {
             ;;
 
         3.2|3.2.patched)
-            RUBY_VERSION="3.2.2"
-            RUBY_DOWNLOAD_SHA256="96c57558871a6748de5bc9f274e93f4b5aad06cd8f37befa0e8d94e7b8a423bc"
+            RUBY_VERSION="3.2.3"
+            RUBY_DOWNLOAD_SHA256="af7f1757d9ddb630345988139211f1fd570ff5ba830def1cc7c468ae9b65c9ba"
             ;;