chore: set vscode extension version to v0.0.11

[harry-hov]

Inshort: Don't always use latest version of vscode. Stick to v0.0.11 that already has been tried-and-tested.

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Latest version of vscode-gno extension utilizes language server to provide some feature.

I opened a PR #122, which configures gitpod to be able to use latest version of vscode-code.

Seems like @thehowl encountered some bugs while testing [vscode-gno + gnopls]
(See: #122 (comment))

We have 2 options now:

• Option1: Stick to old version (this is what this PR does) (I recommend this considering lack of time)
• Option2: Merge PR Install gnopls and set GNOROOT #122 and disable language server if you encounter bugs, than the extension will work like old version
  

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