Update lab-instructions.md

[develowlper]

Updated SignalR Service function app extension to use latest version.

Purpose

Tested the turorial with v 0.2.0-aplha. It was not working. Upgraded to v 0.3.0-aplha and the SignaR ConnectionInfo could be retrieved.

• ...

Does this introduce a breaking change?

[ ] Yes
[ x] No

Pull Request Type

Small fix in Docs

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

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Other Information