Arm backend: Update transformers package to 5.3.0 (#21060)

Move transformers package pin to 5.3.0 for example models

Signed-off-by: Saoirse Stewart <saoirse.stewart@arm.com>

Author: SaoirseARM

examples/arm/image_classification_example_ethos_u/requirements.txt

@@ -4,5 +4,5 @@
 # LICENSE file in the root directory of this source tree.
 
 evaluate == 0.4.6
-transformers[torch] == 4.56.1
+transformers[torch] == 5.3.0
 tqdm == 4.67.1