chore(deps): update dependency fastly/cli to v15.3.1

[renovate]

This PR contains the following updates:

Package	Update	Change
fastly/cli	minor	v15.2.0 → v15.3.1

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Release Notes

fastly/cli (fastly/cli)

v15.3.1

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Fix Checksum issue from troubleshooting new tap release

v15.3.0

Compare Source

Enhancements:

• feat(kvstoreentry/delete): Add support for multiple-key deletion using a key prefix. (#​1822)
• build(dockerfile-go): add Go Dockerfile alongside the existing Node and Rust ones (#​1828)
• feat(compute/deploy): Support 'contentguard' configuration on 'bot_management' product under [setup.products] (#​1827)

Dependencies:

• build(deps): github.com/nwaples/rardecode/v2 from 2.2.3 to 2.2.5 (#​1825)
• build(deps): golang.org/x/net from 0.55.0 to 0.56.0 (#​1825)
• build(deps): github.com/coreos/go-oidc/v3 from 3.18.0 to 3.19.0 (#​1829)

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