[golang/go] cmd/go/internal/vcweb/vcstest: TestScripts/git/v3pkg.txt failures

### ROOT CAUSE The test `TestScripts/git/v3pkg.txt` is failing because the commit message in the test script is truncated. The test expects the commit message to be 'all: add go.mod', but the test script only provides 'all: add go.mo'. This typo causes the test to fail because the commit message does not match the expected value. ### CODE FIX Change the line in the test script `cmd/go/internal/vcweb/vcstest/TestScripts/git/v3pkg.txt` that contains the git commit command to use the correct commit message. Specifically, change the line: ```bash git commit -a -m 'all: add go.mo ``` to: ```bash git commit -a -m 'all: add go.mod ``` This change ensures that the commit message matches the expected value, resolving the test failure.