fix: lint-lockfile flaky job by changing resources from medium to medium-plus

[seaona]

Description

The lint-lockfile job is flaky. It seems it's under-resourced peaking max cpu and ram values, as @Gudahtt pointed out:

Related issues

Fixes: #27806

Manual testing steps

1. Check lint-lockfile job

Screenshots/Recordings

Increasing resources from medium to medium-plus
https://circleci.com/pricing/price-list/

Resource usage after the change:

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [38e841d]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1760 ± 87 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1534	2318	1765	182	87
		domContentLoaded	1526	2192	1726	158	76
		load	1535	2332	1760	181	87
		domInteractive	18	97	40	22	10
		backgroundConnect	7	136	30	32	16
		firstReactRender	45	127	82	26	12
		getState	4	59	18	18	8
		initialActions	0	1	0	0	0
		loadScripts	1083	1615	1265	138	67
		setupStore	10	96	34	27	13
		uiStartup	1683	2663	1969	215	103

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[hjetpoluru]

LGTM

[Gudahtt]

LGTM!