TestHTTP2GoAwayError filing on windows gotip

[mstoykov]

--- FAIL: TestHTTP2GoAwayError (0.00s)
    error_codes_test.go:334: 
        	Error Trace:	D:/a/k6/k6/lib/netext/httpext/error_codes_test.go:334
        	Error:      	Not equal: 
        	            	expected: 0x657
        	            	actual  : 0x4b0
        	Test:       	TestHTTP2GoAwayError
    error_codes_test.go:335: 
        	Error Trace:	D:/a/k6/k6/lib/netext/httpext/error_codes_test.go:335
        	Error:      	Not equal: 
        	            	expected: "http2: received GoAway with http2 ErrCode INADEQUATE_SECURITY"
        	            	actual  : "read tcp 127.0.0.1:51877->127.0.0.1:51876: wsarecv: An established connection was aborted by the software in your host machine."
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1 +1 @@
        	            	-http2: received GoAway with http2 ErrCode INADEQUATE_SECURITY
        	            	+read tcp 127.0.0.1:51877->127.0.0.1:51876: wsarecv: An established connection was aborted by the software in your host machine.
        	Test:       	TestHTTP2GoAwayError

This started happening around the beginning of December

I can't reproduce it on my local windows VM wiht the same gotip version and nothing I tried in #4097 worked to tease it out