docs: fix admonitions

README.md

@@ -50,10 +50,10 @@ You can view the entire database at [ThemerrDB](https://app.lizardbyte.dev/Theme
 
 3. Add the requested URLs to the issue.
 
-   > **Warning**
-   > YouTube URLs should only contain the video ID parameter. i.e. `https://www.youtube.com/watch?v={VIDEO_ID}` or
-   >`https://youtu.be/{VIDEO_ID}`
-   
+  > [!WARNING]
+  > YouTube URLs should only contain the video ID parameter. i.e. `https://www.youtube.com/watch?v={VIDEO_ID}` or
+  >`https://youtu.be/{VIDEO_ID}`
+
    :link: See [YouTube Share](docs/YouTube_Share.md) for further instruction.
 
 4. Submit the issue.
@@ -104,7 +104,7 @@ at UTC 12:00. Theme songs will not be available until they are published.
 
    `https://app.lizardbyte.dev/ThemerrDB/<media_type>/<database>/<item_id>.json`
 
-   > **Note**
+   > [!NOTE]
    > Not all movies will be available in the `imdb` database directory. This is due to the fact that the
    > `imdb_id` is missing from the item's entry in `themoviedb`.
 

docs/Theme_Guidelines.md

@@ -13,7 +13,7 @@ are used as a general guideline for selecting and approving themes.
 | 2:46-5:00          | D     |
 | < 0:30 *or* > 5:00 | F     |
 
-> **Note**
+> [!NOTE]
 > These are not strict rules, but the preference is to generally avoid themes that are too short or too long.
 
 ## Volume
@@ -26,15 +26,15 @@ preferred.
 YouTube restricts videos based on age. If the video is not available to users under the age of 18, it will not be
 approved.
 
-> **Note**
+> [!NOTE]
 > This rule is absolute.
 
 ## Geo Restrictions
 
 YouTube restricts videos in some geographical locations. If the video is not available in the United States, it will
 not be approved.
 
-> **Note**
+> [!NOTE]
 > This rule is absolute.
 
 ## Replacing Existing Themes