Fixed pillow package version

Signed-off-by: arpannookala-12 <ganesh.arpan.nookala@cloud2labs.com>
Signed-off-by: Harika <codewith3@gmail.com>

Author: arpannookala-12

sample_solutions/DocSummarization/backend/requirements.txt

@@ -13,7 +13,7 @@ pypdf==6.1.1
 python-docx==1.1.0
 pdf2image==1.16.3
 pytesseract==0.3.10
-Pillow==10.3.0
+Pillow==12.1.1
 
 # Configuration Management
 python-dotenv==1.0.0