chore(deps): update actions/cache digest to 81382a7 (open-feature#1044)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/merge.yml

@@ -32,7 +32,7 @@ jobs:
         server-password: ${{ secrets.OSSRH_PASSWORD }}
 
     - name: Cache local Maven repository
-      uses: actions/cache@57b8e405f0f6efe89131ba09709ce4bc33291a51
+      uses: actions/cache@81382a721fc89d96eca335d0c3ba33144b2baa9d
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}

.github/workflows/pullrequest.yml

@@ -25,7 +25,7 @@ jobs:
           languages: java
 
       - name: Cache local Maven repository
-        uses: actions/cache@57b8e405f0f6efe89131ba09709ce4bc33291a51
+        uses: actions/cache@81382a721fc89d96eca335d0c3ba33144b2baa9d
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}