Bump actions/checkout from v2.3.2 to v2.3.3 (#16)

Bumps [actions/checkout](https://github.com/actions/checkout) from v2.3.2 to v2.3.3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2.3.2...a81bbbf8298c0fa03ea29cdc473d45769f953675)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 5f89c7c..35dcb38 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -31,7 +31,7 @@
             experimental: true        
         
     steps:
-    - uses: actions/checkout@v2.3.2
+    - uses: actions/checkout@v2.3.3
     - uses: actions/cache@v2
       with:
         path: ~/.m2/repository