fix: 🐛 use correct MIME type for mapbox vector tiles

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `from_bytes` associated function to `PMTiles`-, `Header`- and `Directory`-struct
 - Add `from_bytes_partially` associated function to `PMTiles`-struct
 - Add `find_entry_for_tile_id` method to `Directory`-struct
+- Fix the MIME type for Mapbox Vector Tiles (previously `application/x-protobuf`, now `application/vnd.mapbox-vector-tile`)
 
 ## [0.2.2] - 2023-10-23
 - Tweaks to documentation

src/header/tile_type.rs

@@ -31,7 +31,7 @@ impl TileType {
     /// Returns [`None`] if a concrete `Content-Type` could not be determined.
     pub const fn http_content_type(&self) -> Option<&'static str> {
         match self {
-            Self::Mvt => Some("application/x-protobuf"),
+            Self::Mvt => Some("application/vnd.mapbox-vector-tile"),
             Self::Png => Some("image/png"),
             Self::Jpeg => Some("image/jpeg"),
             Self::WebP => Some("image/webp"),
@@ -51,7 +51,7 @@ mod test {
 
         assert_eq!(
             TileType::Mvt.http_content_type(),
-            Some("application/x-protobuf")
+            Some("application/vnd.mapbox-vector-tile")
         );
 
         assert_eq!(TileType::Png.http_content_type(), Some("image/png"));