fix a little bug of example code

[bxshcn]

when I tries to make a test of GoMock referring to the example listed in the doc, I always get

--- FAIL: TestMyThing (0.00s) c:\Users\bxshc\Documents\projects\design-pattern\48\busi\busi_test.go:22: Unexpected call to *mock_busi.MockMyInterface.SomeMethod1([4]) at c:/Users/bxshc/Documents/projects/design-pattern/48/busi/mock_busi/mock_busi.go:50 because: expected call at c:/Users/bxshc/Documents/projects/design-pattern/48/busi/busi_test.go:18 doesn't match the argument at index 0. Got: 4 Want: is equal to 4

so I think there maybe something wrong with the type, then I debug it and found that it should specify the exact type of 4 as int64, a pure 4 will result in a type of int.

the change is very simple, just as

• mockObj.EXPECT().SomeMethod(4, "blah")

• mockObj.EXPECT().SomeMethod(int64(4), "blah")

  so that's all, may you should change the example or make a more intelligent infer from the original interface information when generate the mock code.

thanks！

[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

:memo: Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[google-cla[bot]]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

:memo: Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here with @googlebot I signed it! and we'll verify it.

---

What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
• The email used to register you as an authorized contributor must be the email used for the Git commit. Check your existing CLA data and verify that your email is set on your git commits.
• The email used to register you as an authorized contributor must also be attached to your GitHub account.

ℹ️ Googlers: Go here for more info.

[bxshcn]

i'll re-PR with another email.