Fix be test #2 (dotnet#86323)

Author: EgorBo

src/libraries/System.Memory/tests/MemoryMarshal/GetReference.cs

@@ -107,13 +107,13 @@ public static void ReadOnlySpanGetReferenceAndReadInteger()
             Assert.Equal(BitConverter.IsLittleEndian ?
                 0x65_00_68 :
                 0x68_00_65,
-                Unsafe.As<byte, int>(ref Unsafe.Add(ref Unsafe.As<char, byte>(
+                Unsafe.ReadUnaligned<int>(ref Unsafe.Add(ref Unsafe.As<char, byte>(
                     ref MemoryMarshal.GetReference("hello world 1".AsSpan())), 0)));
 
             Assert.Equal(BitConverter.IsLittleEndian ?
                 0x6F_00_6C_00_6C_00_65_00 :
-                0x00_65_00_6C_00_6C_00_6F,
-                Unsafe.As<byte, long>(ref Unsafe.Add(ref Unsafe.As<char, byte>(
+                0x68_00_65_00_6C_00_6C_00,
+                Unsafe.ReadUnaligned<long>(ref Unsafe.Add(ref Unsafe.As<char, byte>(
                     ref MemoryMarshal.GetReference("hello world 2".AsSpan())), 1)));
         }
     }