By Tzvi Machlin For 20 years Sue Bird has been one of the WNBA’s biggest stars and an icon of women’s basketball. But this season will be her last in the league. Taking to Twitter on Thursday, Bird announced that she will be retiring after the 2022 WNBA season. She said that she has loved playing in the league and intends to enjoy it just as much as her first season. “I’ve decided this will be my final year. I have loved every single minute, and still do, so gonna play my last year, just like this little girl played her first #TheFinalYear,” Bird tweeted. Her message already has over 4,000 lik…