fix: Fix bugs with convert

[TylerHelmuth]

Which problem is this PR solving?

• An issue where APIKeys was not properly converted.
• An issue where InMemCollector.MaxAlloc was not properly converted.
• closes Convert does not correctly convert MaxAlloc or APIKeys #765

Short description of the changes

• Fix 2 template typos.

Input:

config:
  APIKeys: 
    - test-key
  InMemCollector:
    MaxAlloc: 3865470566

Command: convert helm -i test.yaml -o result.yaml

Before output:

config:
    AccessKeys:
        AcceptOnlyListedKeys: true
    General:
        ConfigurationVersion: 2
        MinRefineryVersion: v2.0

After output:

config:
    AccessKeys:
        AcceptOnlyListedKeys: true
        ReceiveKeys:
            - test-key
    Collection:
        MaxAlloc: 3.865GB
    General:
        ConfigurationVersion: 2
        MinRefineryVersion: v2.0

[cartermp]

We'll also want to update the docs repo with this change once it's in.

[TylerHelmuth]

@cartermp I'll get the docs repo updated in a single PR once all these 2.0.1 PRs are merged.