fix: properly pass guild_id to http's get_guild

[AstreaTSS]

Pull Request Type

• Feature addition
• Bugfix
• Documentation update
• Code refactor
• Tests improvement
• CI/CD pipeline enhancement
• Other: [Replace with a description]

Description

Fixes #1393, which prevented properly fetching a guild.

Changes

• Properly pass in guild_id to the Route for get_guild, not to the parameters.

Related Issues

#1393

Test Scenarios

await bot.fetch_guild(1234)  # invalid id, so will bypass cache anyhow

Python Compatibility

• I've ensured my code works on Python 3.10.x
• I've ensured my code works on Python 3.11.x

Checklist

• I've run the pre-commit code linter over all edited files
• I've tested my changes on supported Python versions
• I've added tests for my code, if applicable
• I've updated / added documentation, where applicable