chore(jellyfish-api-core): Change assert order in `getMiningInfo.test…

….ts` to match other tests (#1865)

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#### What this PR does / why we need it:
Uses to the assertion order used by all other tests. Uses a regex
pattern to match instead of `toContain`.

#### Additional comments?:

As requested in
#1841 (comment)

packages/jellyfish-api-core/__tests__/category/mining/getMiningInfo.test.ts

@@ -39,6 +39,6 @@ describe('Mining', () => {
     expect(info.networkhashps).toBeGreaterThan(0)
     expect(info.pooledtx).toStrictEqual(0)
     expect(info.chain).toStrictEqual('regtest')
-    expect(['', 'This is a pre-release test build - use at your own risk - do not use for mining or merchant applications']).toContain(info.warnings)
+    expect(info.warnings).toMatch(/^This is a pre-release test build - use at your own risk - do not use for mining or merchant applications+$|^$/)
   })
 })