[ImgBot] Optimize images

*Total -- 212.74kb -> 150.48kb (29.26%)

/src/BlazorExtensions/BlazorWebAssProject/wwwroot/favicon.png -- 1.12kb -> 0.77kb (30.92%)
/src/DotNetGlobalToolsExtensions/DotNetGlobalToolsExtensions.Web/wwwroot/favicon.png -- 1.12kb -> 0.77kb (30.92%)
/src/TestExtensions/TestExtensions.Web/wwwroot/favicon.png -- 1.12kb -> 0.77kb (30.92%)
/docs/images/Global/FirstPage.png -- 209.37kb -> 148.16kb (29.24%)

Signed-off-by: ImgBotApp <[email protected]>

Author: ImgBotApp