Upgrade to setup-scala v10 to fix GitHub Action CI (msgpack#538)

* Use latest setup-scala

* Update CI.yml

Co-authored-by: Taro L. Saito <leo@xerial.org>

Author: komamitsu

.github/workflows/CI.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: olafurpg/setup-scala@v7
+      - uses: olafurpg/setup-scala@v10
         with:
           java-version: adopt@1.11
       - uses: actions/cache@v2
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: olafurpg/setup-scala@v7
+      - uses: olafurpg/setup-scala@v10
         with:
           java-version: adopt@1.8
       - uses: actions/cache@v2