ci: update backfill-corr-ci.yml

* simplify caching (r-lib/setup-r-dependencies caches by default)
* switch to Ubuntu latest
* keep R on 4.2

Author: dshemetov

.github/workflows/backfill-corr-ci.yml

@@ -10,57 +10,37 @@ name: R backfill corrections
 
 on:
   push:
-    branches: [ main, prod ]
+    branches: [main, prod]
   pull_request:
-    types: [ opened, synchronize, reopened, ready_for_review ]
-    branches: [ main, prod ]
+    types: [opened, synchronize, reopened, ready_for_review]
+    branches: [main, prod]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     if: github.event.pull_request.draft == false
-    strategy:
-      matrix:
-        r-version: [4.2.1]
     defaults:
       run:
         working-directory: backfill_corrections/delphiBackfillCorrection
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up R ${{ matrix.r-version }}
+      - uses: actions/checkout@v4
+
+      - name: Set up R 4.2
         uses: r-lib/actions/setup-r@v2
         with:
-          r-version: ${{ matrix.r-version }}
           use-public-rspm: true
-      - name: Install linux dependencies
-        run: |
-            sudo apt-get install \
-              libcurl4-openssl-dev \
-              libgdal-dev \
-              libudunits2-dev \
-              libglpk-dev \
-              libharfbuzz-dev \
-              libfribidi-dev
-      - name: Get date
-        id: get-date
-        run: |
-          echo "::set-output name=date::$(/bin/date -u "+%Y%m%d")"
-      - name: Cache R packages
-        uses: actions/cache@v2
-        with:
-          path: ${{ env.R_LIBS_USER }}
-          key: ${{ runner.os }}-r-backfillcorr-${{ steps.get-date.outputs.date }}
-          restore-keys: |
-            ${{ runner.os }}-r-backfillcorr-
+          r-version: 4.2
+
       - name: Install and cache dependencies
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: any::rcmdcheck
           working-directory: backfill_corrections/delphiBackfillCorrection
-          upgrade: 'TRUE'
+          upgrade: "TRUE"
+
       - name: Check package
         uses: r-lib/actions/check-r-package@v2
         with: