try handling missing notes (#49)

Signed-off-by: Tom Hennen <[email protected]>

Author: TomHennen

actions/get_note/action.yml

@@ -16,5 +16,5 @@ runs:
           git config user.name "${{ github.actor }}"
           git config user.email "${{ github.actor }}@users.noreply.github.com"
           git fetch origin "refs/notes/*:refs/notes/*"
-          git notes show ${{ inputs.commit }} >> ${{ inputs.path }}
+          git notes show ${{ inputs.commit }} || echo "" >> ${{ inputs.path }}
       shell: bash