Fail in last PR regarding the use of json module

[ValentinBuira]

There is a typo in my last PR regarding the use of json module

I used json.loads with a s instead of json.load that support de serializing python object and not string

Every use of workspace_service failed in the plugin because of that

[coveralls]

Pull Request Test Coverage Report for Build 12198737480

Details

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 79.317%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
mergin/client.py	0	1	0.0%

Totals
Change from base Build 12176048796:	0.0%
Covered Lines:	3275
Relevant Lines:	4129

---

💛 - Coveralls

[MarcelGeo]

Fix is ok. We need to update tests to catch these errors for workspace_service method