fix(naming): update name in the instance test

[tty47]

the idea of this PR is to fix #368 , by updating the instance name

[tty47]

--- PASS: TestExternalFile (14.67s)

found another one:

=== NAME  TestFile
    file_test.go:63: Error getting IP 'error deploying service for instance 'web-ed745da1': error deploying service 'web-ed745da1': error creating service web-ed745da1: services "web-ed745da1" already exists':
    file_test.go:56: 
        	Error Trace:	/home/runner/work/knuu/knuu/e2e/basic/file_test.go:56
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1175
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1353
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1683
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/runtime/panic.go:626
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1005
        	            				/home/runner/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1089
        	            				/home/runner/work/knuu/knuu/e2e/basic/file_test.go:63
        	Error:      	Received unexpected error:
        	            	destroying is only allowed in state 'Started' or 'Destroyed'. Current state is 'Committed
        	Test:       	TestFile
--- FAIL: TestFile (5.29s)