优化图像路径管理

在 `ImageHasherTest.cs` 文件中，将所有硬编码的图像文件路径 `@"F:\1.jpg"` 替换为常量 `Path`，提高了代码的可读性和可维护性。

BenchmarkTest/ImageHasherTest.cs

@@ -6,45 +6,47 @@ namespace BenchmarkTest;
 [MemoryDiagnoser]
 public class ImageHasherTest
 {
+    private const string Path = @"F:\1.jpg";
+
     [Benchmark]
     public void AverageHash64()
     {
         var hasher = new ImageHasher();
-        hasher.AverageHash64(@"F:\1.jpg");
+        hasher.AverageHash64(Path);
     }
 
     [Benchmark]
     public void MedianHash256()
     {
         var hasher = new ImageHasher();
-        hasher.MedianHash256(@"F:\1.jpg");
+        hasher.MedianHash256(Path);
     }
 
     [Benchmark]
     public void MedianHash64()
     {
         var hasher = new ImageHasher();
-        hasher.MedianHash64(@"F:\1.jpg");
+        hasher.MedianHash64(Path);
     }
 
     [Benchmark]
     public void DifferenceHash64()
     {
         var hasher = new ImageHasher();
-        hasher.DifferenceHash64(@"F:\1.jpg");
+        hasher.DifferenceHash64(Path);
     }
 
     [Benchmark]
     public void DifferenceHash256()
     {
         var hasher = new ImageHasher();
-        hasher.DifferenceHash256(@"F:\1.jpg");
+        hasher.DifferenceHash256(Path);
     }
 
     [Benchmark]
     public void DctHash()
     {
         var hasher = new ImageHasher();
-        hasher.DctHash(@"F:\1.jpg");
+        hasher.DctHash(Path);
     }
 }