Bump actions/cache from 2.1.5 to 2.1.6 (#650)

Bumps [actions/cache](https://github.com/actions/cache) from 2.1.5 to 2.1.6.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v2.1.5...v2.1.6)

Signed-off-by: dependabot[bot] <support@github.com>

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.9
-      - uses: actions/cache@v2.1.5
+      - uses: actions/cache@v2.1.6
         id: cache
         with:
           path: /tmp/lce_android
@@ -93,7 +93,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8
-      - uses: actions/cache@v2.1.5
+      - uses: actions/cache@v2.1.6
         id: cache
         with:
           path: /tmp/lce_android

.github/workflows/unittests.yml

@@ -123,7 +123,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.9
-      - uses: actions/cache@v2.1.5
+      - uses: actions/cache@v2.1.6
         id: cache
         with:
           path: /tmp/lce_android