Fixed encoding for all requests in Google Sheets

Editor assessment

The subject says the what, encoding fixed for all requests in Google Sheets, but not the symptom it cured, and the fix type, while fitting, leaves the failure mode unrecorded. The body's first bullet restates the headline; the second, 'Additional commit for CI check', is empty noise suggesting the commit was bumped for automation rather than explained. No scope marks the Google Sheets plugin, past tense dominates, and the issue reference alone anchors the change. Understandable, but it documents nothing a reader could learn from.