fix(Languages/{es,en}/10_InsertionSort): fix Python example indentation

[xuyua9]

What

Fix the Python insertion-sort examples in the English and Spanish Lesson 10 READMEs by aligning return arr with the surrounding tab-indented function body.

Why

The copied examples currently raise IndentationError: unindent does not match any outer indentation level because the final return line uses four spaces while the rest of the function uses tabs. This prevents learners from running the reference implementation.

Validation

• Reproduced the IndentationError against both origin/main snippets.
• Executed both corrected snippets with [1, 5, 3, 2] and got [1, 2, 3, 5].
• git diff --check passed.