Prefer capitalised acronyms as per PEP 8

For reference, see https://peps.python.org/pep-0008/#descriptive-naming-styles

src/requtests/parsed_request.py

@@ -4,7 +4,7 @@
 from urllib.parse import parse_qs, urlparse
 
 
-class CannotParseBodyAsJson(RuntimeError):
+class CannotParseBodyAsJSON(RuntimeError):
     def __init__(self, error):
         super().__init__(error)
         self.error = error
@@ -39,7 +39,7 @@ def json(self) -> Any:
         try:
             return json.loads(self.prepared_request.body)
         except (TypeError, JSONDecodeError) as e:
-            raise CannotParseBodyAsJson(e)
+            raise CannotParseBodyAsJSON(e)
 
     @property
     def method(self) -> str:

tests/parsed_request_test.py

@@ -2,7 +2,7 @@
 import pytest
 import re
 from requtests import ParsedRequest
-from requtests.parsed_request import CannotParseBodyAsJson
+from requtests.parsed_request import CannotParseBodyAsJSON
 from tests.test_utils import build_request
 
 
@@ -51,7 +51,7 @@ def test_parsing_a_prepared_request(prepared_request):
 def test_json_with_an_empty_body(parsed_request):
     parsed_request.prepared_request.body = None
     expected_message = "the JSON object must be str, bytes or bytearray, not NoneType"
-    with pytest.raises(CannotParseBodyAsJson, match=expected_message) as exc_info:
+    with pytest.raises(CannotParseBodyAsJSON, match=expected_message) as exc_info:
         parsed_request.json
     underlying_error = exc_info.value.error
     assert isinstance(underlying_error, TypeError)
@@ -60,7 +60,7 @@ def test_json_with_an_empty_body(parsed_request):
 def test_json_with_an_invalid_json_body(parsed_request):
     parsed_request.prepared_request.body = '{"broken": "json'
     expected_message = re.escape("Unterminated string starting at: line 1 column 12 (char 11)")
-    with pytest.raises(CannotParseBodyAsJson, match=expected_message) as exc_info:
+    with pytest.raises(CannotParseBodyAsJSON, match=expected_message) as exc_info:
         parsed_request.json
     underlying_error = exc_info.value.error
     assert isinstance(underlying_error, JSONDecodeError)