chore: update deps and use multiple cores in cs fixer

[bencromwell]

• Leverage multiple CPU cores for the PHP CS Fixer, speeds things up quite considerably there (runs in around a third of the time on my Ryzen 5 5600X)
• Update dependencies.

[github-actions]

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Download the OpenAPI Changes Report

Core API Changes

├─┬Paths
│ ├──[➕] path (1220:5)
│ ├─┬/virtual_machine_packages
│ │ └─┬GET
│ │   └─┬Responses
│ │     └─┬200
│ │       └─┬application/json
│ │         └─┬Schema
│ │           └─┬virtual_machine_packages
│ │             └─┬Schema
│ │               └──[🔀] $ref (15295:17)❌ 
│ └─┬/organizations/organization/virtual_machines/build
│   └─┬POST
│     ├─┬Responses
│     │ └─┬422
│     │   └─┬application/json
│     │     └─┬Schema
│     │       └──[🔀] $ref (16434:18)❌ 
│     └─┬Requestbody
│       └─┬application/json
│         └─┬Schema
│           └──[➕] properties (11108:19)
└─┬Components
  ├──[➖] responses (20905:48)❌ 
  ├──[➕] responses (21015:69)
  ├──[➖] schemas (16587:44)❌ 
  ├──[➖] schemas (16281:53)❌ 
  ├──[➖] schemas (16550:69)❌ 
  ├──[➕] schemas (16151:43)
  ├──[➕] schemas (16418:38)
  ├──[➕] schemas (16412:36)
  ├──[➕] schemas (15348:37)
  ├──[➕] schemas (16433:74)
  ├─┬GetDiskTemplate200ResponseDiskTemplate
  │ └──[➕] properties (14701:11)
  ├─┬VirtualMachinePackage
  │ └──[➕] properties (15336:11)
  ├─┬DiskTemplate
  │ └──[➕] properties (13156:11)
  └─┬GetOrganizationDiskTemplates200ResponseDiskTemplates
    └──[➕] properties (14592:11)

Document Element	Total Changes	Breaking Changes
paths	4	2
components	14	4

Date: 09/03/24 | Commit: New: katapult-core-openapi.json, Original: /tmp/katapult-core-openapi.json

• ❌ BREAKING Changes: 6 out of 18
• Modifications: 2
• Removals: 4
• Additions: 12
• Breaking Removals: 4
• Breaking Modifications: 2

ERROR: breaking changes discovered

Public API Changes

└─┬Components
  ├──[➕] schemas (742:37)
  └─┬VirtualMachinePackage
    └──[➕] properties (707:11)

Document Element	Total Changes	Breaking Changes
components	2	0

Date: 09/03/24 | Commit: New: katapult-public-openapi.json, Original: /tmp/katapult-public-openapi.json

• Total Changes: 2
• Additions: 2