[Should fix] README says to store the admin token as a variable instead of a secret #63

Should fix (pr-reviewer): The README tells users to store the admin token as a SETTINGS_GUARD variable, but the example reads secrets.SETTINGS_GUARD (line 27). Following the prose stores the token in plain text and gives the action an empty GH_TOKEN.

Fix: Change the text to "store it as a SETTINGS_GUARD repository secret".

Location:

• settings-action/README.md

  Lines 78 to 79 in a276963

  	and create a token with read and admin permissions and store it as a
  	`SETTINGS_GUARD` variable in the variables menu.

• settings-action/README.md

  Line 27 in a276963

  GH_TOKEN: ${{ secrets.SETTINGS_GUARD }}

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