Update cache action

v2 is not longer available. Update to the most recent.

Author: noelwelsh

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.3.0]
+        scala: [3.3.4]
         java: [temurin@11]
     runs-on: ${{ matrix.os }}
     steps:
@@ -47,7 +47,7 @@ jobs:
           jdkFile: ${{ steps.download-java-temurin-11.outputs.jdkFile }}
 
       - name: Cache sbt
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.sbt