Merge pull request ppy#10167 from Hiviexd/mbc-rules-clarify

Clarify osu!taiko rules in `MBC October 2023` news post

news/2023/2023-10-10-monthly-beatmapping-contest-october-2023.md

@@ -34,6 +34,9 @@ To keep things fresh, every MBC has a *limitation* that requires mappers to comp
 
 Given osu!taiko mapping is pretty limited to begin with, this contest is opting for a more song-oriented challenge: **your beatmap's song must be 240 BPM or faster.**
 
+- If your song contains variable BPM, the most common BPM must be 240 or higher.
+- A beatmap with double the rhythm density of an ordinary map (e.g. [1/8 rhythm functions like usual 1/4 rhythm](https://osu.ppy.sh/beatmapsets/2011128)) is allowed, so long as the song's doubled BPM is 240 or higher.
+
 #### osu!catch
 
 osu!catch is taking a much simpler approach: **your beatmap's star rating must be 5.00 stars or higher.**
@@ -73,6 +76,8 @@ If you're looking for a lawless contest, wait for the next [Aspire](/wiki/Contes
 
 - **Submissions must follow the month's beatmapping [limitation](#limitation):**
   - **osu!taiko:** your beatmap's song must be 240 BPM or faster.
+    - If your song contains variable BPM, the most common BPM must be 240 or higher.
+    - A beatmap with double the rhythm density of an ordinary map (e.g. [1/8 rhythm functions like usual 1/4 rhythm](https://osu.ppy.sh/beatmapsets/2011128)) is allowed, so long as the song's doubled BPM is 240 or higher.
   - **osu!catch:** your beatmap's star rating must be 5.00 stars or higher.
 - **Submissions must be a single difficulty from one of the month's [selected songs](#songs).**
 - **Submissions must be in `.osz` format.**