docs(valid-style-parse): fixed twoslash in rule docs

Co-authored-by: Yosuke Ota <[email protected]>

Author: marekdedic

docs/rules/valid-style-parse.md

@@ -18,25 +18,45 @@ This rule reports issues with parsing of the `<style>` element by the ESLint Sve
 <!--eslint-skip-->
 
 ```svelte
+<script>
+  /* eslint svelte/valid-style-parse: ["error"] */
+</script>
 <!-- ✓ GOOD -->
 <style>
   .class {
     font-weight: bold;
   }
 </style>
+```
 
+```svelte
+<script>
+  /* eslint svelte/valid-style-parse: ["error"] */
+</script>
+<!-- ✓ GOOD -->
 <style lang="scss">
   .class {
     font-weight: bold;
   }
 </style>
+```
 
+```svelte
+<script>
+  /* eslint svelte/valid-style-parse: ["error"] */
+</script>
 <!-- ✗ BAD -->
 <style>
   .class
     font-weight: bold;
 </style>
+```
 
+```svelte
+<script>
+  /* eslint svelte/valid-style-parse: ["error"] */
+</script>
+<!-- ✗ BAD -->
 <style lang="unknown">
   .class {
     font-weight: bold;