Added run icon to hello world task and specified resolver version for the whole course

Cargo.toml

@@ -44,3 +44,5 @@ members = [
 exclude = [
     "**/*.yaml"
 ]
+
+resolver = "2"

Introduction/Getting started/Hello World/task-info.yaml

@@ -1,14 +1,18 @@
 type: edu
 custom_name: "Task: Hello World"
 files:
-- name: src/main.rs
-  visible: true
-  placeholders:
-  - offset: 16
-    length: 26
-    placeholder_text: // put your code here to launch it
-- name: Cargo.toml
-  visible: false
-- name: tests/tests.rs
-  visible: false
-feedback_link: https://docs.google.com/forms/d/e/1FAIpQLSdfJQgjsbDA4pPGpklj3vJnKNspd9wmEHzAgh6EkoJy2IiRuw/viewform?usp=pp_url&entry.2103429047=Introduction+/+Getting+started+/+Hello+World
+  - name: src/main.rs
+    visible: true
+    placeholders:
+      - offset: 16
+        length: 26
+        placeholder_text: // put your code here to launch it
+  - name: Cargo.toml
+    visible: false
+  - name: tests/tests.rs
+    visible: false
+  - name: images/run_dark.svg
+    visible: false
+  - name: images/run.svg
+    visible: false
+feedback_link: https://docs.google.com/forms/d/e/1FAIpQLSdfJQgjsbDA4pPGpklj3vJnKNspd9wmEHzAgh6EkoJy2IiRuw/viewform?usp=pp_url&entry.2103429047=Introduction+/+Getting+started+/+Hello+World

Introduction/Getting started/Hello World/task.md

@@ -17,7 +17,7 @@ Now let's replace the line inside the main function with the code:
 ```
 ##### Example: A program that prints Hello, world!
 
-To run this code click on **Run** icon at the left-upper corner of the editor. Click **Check** button in the **Task Description** window to run the tests checking the correctness of the solution provided.
+To run this code click on **Run** icon (![](images/run.svg)) at the left-upper corner of the editor. Click **Check** button in the **Task Description** window to run the tests checking the correctness of the solution provided.
 
 If `Hello, world!` did print, congratulations! You’ve officially written a Rust program. That makes you a Rust programmer—welcome!
 
@@ -52,4 +52,10 @@ Third, you see the `"Hello, world!"` string. We pass this string as an argument
 
 Fourth, we end the line with a semicolon (`;`), which indicates that this expression is over and the next one is ready to begin. Most lines of Rust code end with a semicolon.
 
-_You can refer to the following chapter in the Rust Programming Language book: [Hello, World!](https://doc.rust-lang.org/stable/book/ch01-02-hello-world.html)_
+_You can refer to the following chapter in the Rust Programming Language book: [Hello, World!](https://doc.rust-lang.org/stable/book/ch01-02-hello-world.html)_
+
+<style>
+img {
+  display: inline !important;
+}
+</style>