Bump actions/cache from v1 to v2 (#23)

Bumps [actions/cache](https://github.com/actions/cache) from v1 to v2.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v1...b820478)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-pr.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - uses: actions/[email protected]
-      - uses: actions/cache@v1
+      - uses: actions/cache@v2
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - uses: actions/[email protected]
-      - uses: actions/cache@v1
+      - uses: actions/cache@v2
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}