fix(doc): remove permalink

Signed-off-by: NoneBack <[email protected]>

README.md

@@ -36,11 +36,7 @@ A taskflow-like General-purpose Task-parallel Programming Framework for Go, insp
 ## Example
 import latest version: `go get -u github.com/noneback/go-taskflow`
 
-https://github.com/noneback/go-taskflow/blob/96bd23c96f494fbed8bf651b01c8f9ecf3cfdec8/examples/conditional/condition.go#L1-L97
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-https://github.com/noneback/go-taskflow/blob/96bd23c96f494fbed8bf651b01c8f9ecf3cfdec8/examples/parallel_merge_sort/parallel_merge_sort.go#L1-L86
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+[code examples](https://github.com/noneback/go-taskflow/tree/main/examples)
 
 ## Understand Condition Task Correctly
 Condition Node is special in [taskflow-cpp](https://github.com/taskflow/taskflow). It not only enrolls in Condition Control but also in Looping.