Sort the coding languages by applications. (#721)

docs/chapter_sorting/selection_sort.md

@@ -45,10 +45,10 @@
 
 在代码中，我们用 $k$ 来记录未排序区间内的最小元素。
 
-=== "Java"
+=== "Python"
 
-    ```java title="selection_sort.java"
-    [class]{selection_sort}-[func]{selectionSort}
+    ```python title="selection_sort.py"
+    [class]{}-[func]{selection_sort}
     ```
 
 === "C++"
@@ -57,10 +57,16 @@
     [class]{}-[func]{selectionSort}
     ```
 
-=== "Python"
+=== "Java"
 
-    ```python title="selection_sort.py"
-    [class]{}-[func]{selection_sort}
+    ```java title="selection_sort.java"
+    [class]{selection_sort}-[func]{selectionSort}
+    ```
+
+=== "C#"
+
+    ```csharp title="selection_sort.cs"
+    [class]{selection_sort}-[func]{selectionSort}
     ```
 
 === "Go"
@@ -69,6 +75,12 @@
     [class]{}-[func]{selectionSort}
     ```
 
+=== "Swift"
+
+    ```swift title="selection_sort.swift"
+    [class]{}-[func]{selectionSort}
+    ```
+
 === "JS"
 
     ```javascript title="selection_sort.js"
@@ -81,30 +93,6 @@
     [class]{}-[func]{selectionSort}
     ```
 
-=== "C"
-
-    ```c title="selection_sort.c"
-    [class]{}-[func]{selectionSort}
-    ```
-
-=== "C#"
-
-    ```csharp title="selection_sort.cs"
-    [class]{selection_sort}-[func]{selectionSort}
-    ```
-
-=== "Swift"
-
-    ```swift title="selection_sort.swift"
-    [class]{}-[func]{selectionSort}
-    ```
-
-=== "Zig"
-
-    ```zig title="selection_sort.zig"
-    [class]{}-[func]{selectionSort}
-    ```
-
 === "Dart"
 
     ```dart title="selection_sort.dart"
@@ -117,6 +105,18 @@
     [class]{}-[func]{selection_sort}
     ```
 
+=== "C"
+
+    ```c title="selection_sort.c"
+    [class]{}-[func]{selectionSort}
+    ```
+
+=== "Zig"
+
+    ```zig title="selection_sort.zig"
+    [class]{}-[func]{selectionSort}
+    ```
+
 ## 算法特性
 
 - **时间复杂度为 $O(n^2)$、非自适应排序**：外循环共 $n - 1$ 轮，第一轮的未排序区间长度为 $n$ ，最后一轮的未排序区间长度为 $2$ ，即各轮外循环分别包含 $n$、$n - 1$、$\dots$、$3$、$2$ 轮内循环，求和为 $\frac{(n - 1)(n + 2)}{2}$ 。