fix: replace all the hyphen to underscore in ModRelativePath

[zong-zhe]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• [ ] N
• [x] Y

closes #513

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• [x] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features
• [ ] Performance regression: Consumes more CPU
• [ ] Performance regression: Consumes more Memory
• [ ] Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• [x] N
• [ ] Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• [x] Unit test
• [ ] Integration test
• [ ] Benchmark (add benchmark stats below)
• [ ] Manual test (add detailed scripts or steps below)
• [ ] Other

[coveralls]

Pull Request Test Coverage Report for Build 11909977046

Details

• 10 of 30 (33.33%) changed or added relevant lines in 2 files are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.06%) to 41.876%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/client/run.go	10	12	83.33%
pkg/utils/utils.go	0	18	0.0%
<!--	Total:	10	30	33.33%	-->

Files with Coverage Reduction	New Missed Lines	%
pkg/client/client.go	6	54.87%
<!--	Total:	6		-->

Totals
Change from base Build 11887351515:	-0.06%
Covered Lines:	4010
Relevant Lines:	9576

---

💛 - Coveralls