test(bump): remove zero-width space from DEPENDABOT_BODY fixture

Replaced the invisible U+200B in '@actions/artifact' with plain ASCII so the fixture is readable, greppable, and produces clean diffs. Test still asserts the regression (type tokens in commit body don't trigger a bump).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bearomorphism

tests/test_bump_find_increment.py

@@ -133,7 +133,7 @@ def test_find_increment_sve(messages, expected_type):
     "<summary>Commits</summary>\n"
     "<ul>\n"
     '<li><a href="...">b5b1a91</a>\n'
-    "fix: update <code>@​actions/artifact</code> to ^5.0.0 for Node.js 24\n"
+    "fix: update <code>@actions/artifact</code> to ^5.0.0 for Node.js 24\n"
     "punycode fix</li>\n"
     '<li><a href="...">5f643d3</a>\n'
     "chore: update license files</li>\n"