BUG: Use NumberObject for /Border elements of annotations (#2451)

As defined in Table 164 – Entries common to all annotation dictionaries, the /Border Array consists of NumberObjects. Previously, pypdf used NameObject which is wrong.

The previous version caused a warning in the class NameObject: "Incorrect first char in NameObject:({self})".

Fixes #2444

pypdf/annotations/_markup_annotations.py

@@ -325,9 +325,9 @@ def __init__(
 
         border_arr: BorderArrayType
         if border is not None:
-            border_arr = [NameObject(n) for n in border[:3]]
+            border_arr = [NumberObject(n) for n in border[:3]]
             if len(border) == 4:
-                dash_pattern = ArrayObject([NameObject(n) for n in border[3]])
+                dash_pattern = ArrayObject([NumberObject(n) for n in border[3]])
                 border_arr.append(dash_pattern)
         else:
             border_arr = [NumberObject(0)] * 3