Replace @master with @v2

Author: multimeric

.github/workflows/check-bioc.yml

@@ -81,14 +81,14 @@ jobs:
       ## R is already included in the Bioconductor docker images
       - name: Setup R from r-lib
         if: runner.os != 'Linux'
-        uses: r-lib/actions/setup-r@master
+        uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}
 
       ## pandoc is already included in the Bioconductor docker images
       - name: Setup pandoc from r-lib
         if: runner.os != 'Linux'
-        uses: r-lib/actions/setup-pandoc@master
+        uses: r-lib/actions/setup-pandoc@v2
 
       - name: Query dependencies
         run: |
@@ -270,7 +270,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@master
+        uses: actions/upload-artifact@v2
         with:
           name: ${{ runner.os }}-biocversion-RELEASE_3_15-r-4.2-results
           path: check