Rename flowcharts

Sorting/UserInterfaceFlowchart.md

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+```mermaid
+graph TD;
+    A[AlgorithmTester]
+    A --> |make random number file| B[Enter file name]
+    B --> F[How many numbers?]
+    F --> G[Maximum number?]
+    G --> H[Minimum number?] --> |write file|A
+    A --> |sort random number file| K[Enter file name]
+    K --> C[choose sorting algorithms]
+    C --> D[Print the numbers?]
+    D --> |print sorting results|A
+    A --> |exit| J[Exit program]