the yield on T212 is a trailing 12-month yield. This means that it calculates the dividend yield by dividing the sum of dividends paid out over the last 12 months by the current share price. Other sites like for example yahoo finance show forward yields which calculate the dividend yield by taking the sum of the expected/declared dividends in the upcoming 12 months and dividing it by the current share price.
Forward yields account for dividend cuts/raises while trailing yields do not. Note that forward yields aren’t always accurate and that you should always look through the investor relations page for the most accurate data.