test: fix reference to block processing test in p2p_segwit.py

The block test was renamed from `p2p-fullblocks.py` to
`feature_block.py` in commit ca6523d (PR #11774).

Author: theStack

test/functional/p2p_segwit.py

@@ -8,7 +8,12 @@
 import struct
 import time
 
-from test_framework.blocktools import create_block, create_coinbase, add_witness_commitment, WITNESS_COMMITMENT_HEADER
+from test_framework.blocktools import (
+    WITNESS_COMMITMENT_HEADER,
+    add_witness_commitment,
+    create_block,
+    create_coinbase,
+)
 from test_framework.key import ECKey
 from test_framework.messages import (
     BIP125_SEQUENCE_NUMBER,
@@ -860,7 +865,7 @@ def test_block_malleability(self):
     @subtest  # type: ignore
     def test_witness_block_size(self):
         # TODO: Test that non-witness carrying blocks can't exceed 1MB
-        # Skipping this test for now; this is covered in p2p-fullblocktest.py
+        # Skipping this test for now; this is covered in feature_block.py
 
         # Test that witness-bearing blocks are limited at ceil(base + wit/4) <= 1MB.
         block = self.build_next_block()