ci: update versions of actions

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index efe5457..19fa7fa 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -23,7 +23,7 @@ jobs:
       RSPM: ${{ matrix.config.rspm }}

     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4

       - uses: r-lib/actions/setup-r@v2
         with:
@@ -40,7 +40,7 @@ jobs:

       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -67,7 +67,7 @@ jobs:

       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check

.github/workflows/CI.yml

@@ -23,7 +23,7 @@ jobs:
       RSPM: ${{ matrix.config.rspm }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-r@v2
         with:
@@ -40,7 +40,7 @@ jobs:
 
       - name: Cache R packages
         if: runner.os != 'Windows'
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
@@ -67,7 +67,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check