project: rename parse_mentions to parse_note_content

This is more accurate

damus/Models/Mentions.swift

@@ -163,7 +163,7 @@ struct Blocks {
     let blocks: [Block]
 }
 
-func parse_mentions(content: String, tags: [[String]]) -> Blocks {
+func parse_note_content(content: String, tags: [[String]]) -> Blocks {
     var out: [Block] = []
     
     var bs = note_blocks()

damus/Models/Post.swift

@@ -111,6 +111,6 @@ func parse_post_bech32_mention(_ p: Parser) -> ReferencedId? {
 
 /// Return a list of tags
 func parse_post_blocks(content: String) -> [Block] {
-    return parse_mentions(content: content, tags: []).blocks
+    return parse_note_content(content: content, tags: []).blocks
 }