ubuntu w rspm first

Author: sbgraves237

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

@@ -24,8 +24,9 @@ jobs:
         config:
           - {os: windows-latest, r: 'release', rtools-version: '42'}
           - {os: macOS-latest, r: 'release'}
-          - {os: ubuntu-latest, r: 'release'}
           - {os: ubuntu-latest, r: 'devel', rspm: http-user-agent: 'release'}
+          - {os: ubuntu-latest, r: 'release'}
+          - {os: ubuntu-latest, r: 'oldrel-1'}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true