fix(create): update broken SVG paths in templates (#6762)

* fix: Update broken URL in typescript template example

* fix SVG images; improve a11y

* format

Co-authored-by: Joshua Chen <sidachen2003@gmail.com>

packages/create-docusaurus/templates/classic/src/components/HomepageFeatures/index.js

@@ -39,7 +39,7 @@ function Feature({Svg, title, description}) {
   return (
     <div className={clsx('col col--4')}>
       <div className="text--center">
-        <Svg className={styles.featureSvg} alt={title} />
+        <Svg className={styles.featureSvg} role="img" />
       </div>
       <div className="text--center padding-horiz--md">
         <h3>{title}</h3>