Fix for SVG sanitizing (#11742) (#11744)

- Clear our non-breaking-space characters
- These can break SVG rendering in the browser
- Ref: https://github.com/inventree/InvenTree/pull/11655

(cherry picked from commit cead09bcd8)

Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/backend/InvenTree/InvenTree/sanitizer.py

@@ -345,4 +345,8 @@ def sanitize_svg(
         link_rel=None,
     )
 
+    # Replace non-breaking spaces with regular spaces to prevent SVG rendering issues
+    for nbsp in [' ', ' ']:
+        cleaned = cleaned.replace(nbsp, ' ')
+
     return cleaned