docs: minor changes

README.md

@@ -24,7 +24,7 @@ fn main() -> Result<(), SteamError> {
     let steam_client = SteamClient::from(api_key);
 
     // Get a list of all games from the user with the provided Steam ID (given that they are publicly visible)
-    let steam_id = "some-steam-id";
+    let steam_id = String::from("some-steam-id");
     let steam_lib = steam_client.get_library(&steam_id)?;
 
     // Print out the games that were played for more than an hour.

src/games/library.rs

@@ -78,7 +78,7 @@ impl SteamClient {
     /// # use steamr::errors::SteamError;
     /// fn main() -> Result<(), SteamError> {
     ///     let steam_client = SteamClient::from("an-api-key".to_string());
-    ///     let steam_id = "some-steam-id";
+    ///     let steam_id = String::from("some-steam-id");
     ///     let steam_lib = steam_client.get_library(&steam_id)?;
     ///
     ///     // Print out games that were played for more than an hour.

src/games/news.rs

@@ -71,7 +71,7 @@ impl SteamClient {
     /// # use steamr::errors::SteamError;
     /// fn main() -> Result<(), SteamError> {
     ///     let steam_client = SteamClient::from("an-api-key".to_string());
-    ///     let app_id ="10";  // This is CS:GO
+    ///     let app_id = "10";  // This is CS:GO
     ///     let news = steam_client.get_game_news(app_id, 5, 100)?;
     ///
     ///     news.game_news.iter()