Try to wire signing into publishing.

Author: Layoric

.github/workflows/publish-android-maven-central.yml

@@ -21,7 +21,6 @@ jobs:
         run: |
           echo "${{ secrets.OSSRH_GPG }}" > private-key.asc
           gpg --import --batch private-key.asc
-          echo "SIGNING_KEY=$(cat ./private-key.asc)" >> $GITHUB_ENV
 
       - name: Cache Gradle packages
         uses: actions/cache@v2
@@ -42,4 +41,4 @@ jobs:
           OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
           OSSRH_TOKEN: ${{ secrets.OSSRH_TOKEN }}
         working-directory: ./src/AndroidClient
-        run: ./gradlew android:publishAllPublicationsToOSSRHRepository -Psigning.key=${{ env.SIGNING_KEY }}
+        run: ./gradlew android:publishAllPublicationsToOSSRHRepository -Psigning.key=${{ secrets.OSSRH_GPG }}

.github/workflows/publish-client-maven-central.yml

@@ -21,7 +21,6 @@ jobs:
         run: |
           echo "${{ secrets.OSSRH_GPG }}" > private-key.asc
           gpg --import --batch private-key.asc
-          echo "SIGNING_KEY=$(cat ./private-key.asc)" >> $GITHUB_ENV
 
       - name: Cache Gradle packages
         uses: actions/cache@v2
@@ -42,4 +41,4 @@ jobs:
           OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
           OSSRH_TOKEN: ${{ secrets.OSSRH_TOKEN }}
         working-directory: ./src/AndroidClient
-        run: ./gradlew client:publishAllPublicationsToOSSRHRepository -Psigning.key=${{ env.SIGNING_KEY }}
+        run: ./gradlew client:publishAllPublicationsToOSSRHRepository -Psigning.key=${{ secrets.OSSRH_GPG }}