Fix C lint errors

[stdlib-bot]

C Linting Failures

Linting failures were detected in the automated lint workflow run.

Workflow Details

• Run: https://github.com/stdlib-js/stdlib/actions/runs/18114183908
• Type: C Linting
• Date: 2025-09-30 00:22:03 UTC

Error Details

lib/node_modules/@stdlib/ndarray/base/function-object/examples/c/example.c:77:32: style: Variable 'obj2' can be declared as pointer to const [constVariablePointer]
 struct ndarrayFunctionObject *obj2 = stdlib_ndarray_function_allocate( "unary_ndarray_function_2", 1, 1, functions, 1, types, data );
                               ^

Pull Request Instructions

• Please use the following PR title format:
  "chore: fix C lint errors (issue #<ISSUE_NUMBER>)".
• Reference this issue in the "Related Issues" section of the PR body as "resolves #<ISSUE_NUMBER>".