V3.1: Adapt Identifier length to 2048

Previously, the invariant declaring the maximum
length of `Identifier` was set to `2000`. We had
already adapted this to `2024` according to
[aas-specs#306], however the specification was
corrected to `2048` in [aas-specs#306].

We therefore adapt the invariant to a maximum
length of `2048`

[aas-specs#306](admin-shell-io/aas-specs#306)

aas_core_meta/v3_1.py

@@ -1270,8 +1270,8 @@ class Blob_type(bytearray, DBC):
 
 
 @invariant(
-    lambda self: len(self) <= 2024,
-    "Identifier shall have a maximum length of 2024 characters.",
+    lambda self: len(self) <= 2048,
+    "Identifier shall have a maximum length of 2048 characters.",
 )
 class Identifier(Non_empty_XML_serializable_string, DBC):
     """