Add Workflow For Spell-Checking

[O957]

This PR:

• Fixes spelling errors (only 1) found across dpg-standard.
• Adds a workflow called typos.yml to ./.github/workflows that runs in pulls requests and checks for common spelling mistakes.
• Adds a configuration file (_typos.yaml) for the typos workflow.

Example Error Found Using Typos In Action (As Implemented Above)

Example Error Found Using Typos In Pre-Commit (Locally)

One can use _typos.toml to indicate false positives. For example,

Details