fix: typo in variable in vertex muon scan script (#3959)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Bug Fixes**
	- Corrected error handling in the vertex_mu_scan script to properly append NaN values to the time array.
- **Chores**
	- Made spelling corrections in the CI/codespell_ignore.txt file to enhance clarity and correctness.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

CI/codespell_ignore.txt

@@ -5,7 +5,6 @@ coner
 dthe
 iself
 sortings
-fime
 gaus
 te
 parm

Examples/Scripts/vertex_mu_scan.py

@@ -39,7 +39,7 @@ def main(files: List[Path], output: str, title: str = ""):
             if time_file.exists():
                 time = numpy.append(time, float(time_file.read_text()))
             else:
-                fime.append(float("nan"))
+                time.append(float("nan"))
 
             rf = uproot.open(f"{file}:vertexing")