Update ~ to $HOME to fix issues with programs using dart/flutter executables

[TravisKraemer]

Description of what this PR is changing or adding, and why:
Updating the path to the shell profile to use $HOME rather than ~.

Issues fixed by this PR (if any):

I ran into issues while using rinf with it not being able to find dart. Updated my bash_profile from ~ to $HOME for this which solved the issue.

Before when running rinf message

ProcessException: No such file or directory
  Command: dart pub global activate protoc_plugin

It succeeded with this change.

PRs or commits this PR depends on (if any):
None

Presubmit checklist

• This PR is marked as draft with an explanation if not meant to land until a future stable release.
• This PR doesn’t contain automatically generated corrections (Grammarly or similar).
• This PR follows the Google Developer Documentation Style Guidelines — for example, it doesn’t use i.e. or e.g., and it avoids I and we (first person).
• This PR uses semantic line breaks of 80 characters or fewer.

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[sfshaza2]

lgtm

[sfshaza2]

/gcbrun

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 8382786):

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