Merge branch 'main' of https://github.com/r-lib/systemfonts

Author: thomasp85

.github/workflows/R-CMD-check.yaml

@@ -16,6 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
+          - {os: macos-13,   r: 'oldrel'}
           - {os: macos-latest,   r: 'release'}
           - {os: windows-latest, r: 'devel'}
           - {os: windows-latest, r: '4.4'}