docs: update pact-support@googlegroups.com to pact-foundation

[YOU54F]

update deprecated email address

[YOU54F]

Noted the appveyor builds are failing

https://ci.appveyor.com/project/mefellows/pact-go/builds/42982836

I couldn't run the tests locally, as no ruby standalone for m1 macs, but will fire up my intel mac soon.

I actually popped a branch in for GH actions, not realising we already had an appveyor build!

--- FAIL: TestExampleMessageConsumer_UserExists (4.36s)
    pact.go:783: VerifyMessageConsumer failed: error creating message: exit status 255
        
        STDERR:
        'controller' is not recognized as an internal or external command,
        operable program or batch file.
        
        
        STDOUT:
--- FAIL: TestExampleMessageConsumer_Order (0.82s)
    pact.go:783: VerifyMessageConsumer failed: error creating message: exit status 255
        
        STDERR:
        The filename, directory name, or volume label syntax is incorrect.
        
        
        STDOUT:
FAIL
FAIL	github.com/pact-foundation/pact-go/examples/messages/consumer	5.233s
?   	github.com/pact-foundation/pact-go/examples/messages/types	[no test files]
?   	github.com/pact-foundation/pact-go/examples/mux/provider	[no test files]
?   	github.com/pact-foundation/pact-go/examples/mux/provider/cmd/usersvc	[no test files]
?   	github.com/pact-foundation/pact-go/examples/types	[no test files]
FAIL
ERROR: Test failed, logging failure
Running provider tests
ok  	github.com/pact-foundation/pact-go/examples	0.039s [no tests to run]
?   	github.com/pact-foundation/pact-go/examples/consumer/goconsumer	[no test files]
?   	github.com/pact-foundation/pact-go/examples/consumer/goconsumer/cmd/web	[no test files]
ok  	github.com/pact-foundation/pact-go/examples/customTls	6.[967](https://ci.appveyor.com/project/mefellows/pact-go/builds/42982838#L967)s
ok  	github.com/pact-foundation/pact-go/examples/gin/provider	27.528s
?   	github.com/pact-foundation/pact-go/examples/gin/provider/cmd/usersvc	[no test files]
ok  	github.com/pact-foundation/pact-go/examples/httpbin	8.845s
ok  	github.com/pact-foundation/pact-go/examples/messages/provider	10.214s
?   	github.com/pact-foundation/pact-go/examples/messages/types	[no test files]
ok  	github.com/pact-foundation/pact-go/examples/mux/provider	25.764s
?   	github.com/pact-foundation/pact-go/examples/mux/provider/cmd/usersvc	[no test files]
?   	github.com/pact-foundation/pact-go/examples/types	[no test files]
Shutting down any remaining pact processes :)
Done!

[mefellows]

Thanks! This is (very soon) to be replaced by the 2.x.x branch - I'll apply this patch to that branch now also.