fix: the variable HELM_REPO in makefile is incorrect

[LinuxSuRen]

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[sonarqubecloud]

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[github-actions]

There are 20 test cases:

API	Average	Max	Min	Count	Error
POST http://localhost:8080/server.Runner/CreateTestSuite	3.778227ms	3.778227ms	3.778227ms	1	0
gRPC 127.0.0.1:7070/server.Runner/FunctionsQuery	3.263171ms	4.149733ms	2.252172ms	3	0
gRPC 127.0.0.1:7070/server.Runner/GetVersion	3.017329ms	3.878224ms	1.57515ms	3	0
gRPC 127.0.0.1:7070/server.Runner/FunctionsQueryStream	2.555815ms	2.774789ms	2.444078ms	3	0
POST http://localhost:8080/server.Runner/GetSecrets	1.864959ms	1.864959ms	1.864959ms	1	0
POST http://localhost:8080/server.Runner/ListTestCase	1.822962ms	2.273577ms	1.372347ms	2	0
POST http://localhost:8080/server.Runner/GenerateCode	1.79916ms	1.79916ms	1.79916ms	1	0
POST http://localhost:8080/server.Runner/PopularHeaders	1.79256ms	1.79256ms	1.79256ms	1	0
POST http://localhost:8080/server.Runner/FunctionsQuery	1.617451ms	1.617451ms	1.617451ms	1	0
POST http://localhost:8080/server.Runner/GetTestCase	1.606854ms	1.606854ms	1.606854ms	1	0
POST http://localhost:8080/server.Runner/ConvertTestSuite	1.575453ms	1.575453ms	1.575453ms	1	0
POST http://localhost:8080/server.Runner/GetSuites	1.413547ms	1.413547ms	1.413547ms	1	0
POST http://localhost:8080/server.Runner/GetSuggestedAPIs	1.287143ms	1.287143ms	1.287143ms	1	0
POST http://localhost:8080/server.Runner/DeleteTestSuite	906.029µs	1.222339ms	589.72µs	2	0
POST http://localhost:8080/server.Runner/ListCodeGenerator	788.826µs	788.826µs	788.826µs	1	0
POST http://localhost:8080/server.Runner/UpdateTestSuite	757.026µs	757.026µs	757.026µs	1	0
POST http://localhost:8080/server.Runner/GetVersion	710.523µs	710.523µs	710.523µs	1	0
POST http://localhost:8080/server.Runner/GetStores	668.423µs	668.423µs	668.423µs	1	0
POST http://localhost:8080/server.Runner/GetTestSuite	572.819µs	572.819µs	572.819µs	1	0
POST http://localhost:8080/server.Runner/ListConverter	571.219µs	571.219µs	571.219µs	1	0