soroban getting started guide broken

[leighmcculloch]

The main getting started guide for Soroban/Stellar contracts appears to be broken:
https://developers.stellar.org/docs/build/smart-contracts/getting-started/storing-data

The guide proposes to perform:

stellar contract init ./ --with-example increment

However, the --with-example option was deprecated and removed from the CLI.

cc @stellar/devx

[leighmcculloch]

The guide needs updating to use:

stellar contract init . --name increment

And then instruct the user to copy the code in.

[janewang]

Will close after merging #1035

[chadoh]

This is a more comprehensive fix: #1121