Remove code blocks from search index

Kinda closes #1176

CHANGELOG.md

@@ -8,6 +8,7 @@
 for breaking changes with libsass: look for "beginning in Dart Sass"
 - Merge settings for the default language set in the root of `config.toml` and in the `[languages.{default_lang}]` section. 
 This will error if 2 values are set
+- Code blocks content are no longer included in the search index
 
 
 ### Other

components/search/src/lib.rs

@@ -14,9 +14,12 @@ static AMMONIA: Lazy<ammonia::Builder<'static>> = Lazy::new(|| {
     let mut clean_content = HashSet::new();
     clean_content.insert("script");
     clean_content.insert("style");
+    let mut rm_tags = HashSet::new();
+    rm_tags.insert("pre");
     let mut builder = ammonia::Builder::new();
     builder
         .tags(HashSet::new())
+        .rm_tags(rm_tags)
         .tag_attributes(HashMap::new())
         .generic_attributes(HashSet::new())
         .link_rel(None)