Add missing argument to go mod init

[rodrigc]

What was changed

Why?

Without this change, just typeing go mod init without an argument will give an error such as:

go: cannot determine module path for source directory /tmp/dumbo (outside GOPATH, module path must be specified)

Example usage:
	'go mod init example.com/m' to initialize a v0 or v1 module
	'go mod init example.com/m/v2' to initialize a v2 module

Run 'go help mod init' for more information.

Checklist

1. How was this tested:

Followed the tutorial steps from the beginning using go version 1.23.
Also checked, every other usage of go mod init in this repository has an argument.

2. Any docs updates needed?

No

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temporal-learning	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 25, 2024 6:06pm

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