[CI] Upgrade to actions/cache@v2.

Author: vyazelenko

.github/workflows/ci.yml

@@ -24,14 +24,14 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Cache Gradle dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
       - name: Cache Gradle wrappers
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
@@ -67,19 +67,19 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Cache Gradle dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
       - name: Cache Gradle wrappers
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
       - name: Cache NuGet dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.nuget/packages
           key: ${{ runner.os }}-nuget-${{ hashFiles('csharp/**/*.sln') }}
@@ -110,14 +110,14 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Cache Gradle dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
       - name: Cache Gradle wrappers
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
@@ -145,14 +145,14 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
       - name: Cache Gradle dependencies
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: |
             ${{ runner.os }}-gradle-
       - name: Cache Gradle wrappers
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}