update thumbnailer for text

- [x] worked for macos build.
- [x] worked for docker build.

Diffs=
be33bd1b1 update thumbnailer for text (#5667)

.rive_head

diff --git a/.rive_head b/.rive_head
index d82c9bf..e6a16a2 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-215d11c864cc550adbcfc9a47691cf9583fa7f25
+be33bd1b177af88d8ef0704c6f286ef7526455e2

submodules/rive-cpp

diff --git a/submodules/rive-cpp b/submodules/rive-cpp
index ef71372..e8904a4 160000
--- a/submodules/rive-cpp
+++ b/submodules/rive-cpp
@@ -1 +1 @@
-Subproject commit ef713727b5e8c5eb08c5703411f5b891d1d98874
+Subproject commit e8904a48e64a30c88993d924a5a1227c41b1d5c1