fix gpg signing

Author: ajs1998

.github/workflows/publish.yml

@@ -26,5 +26,8 @@ jobs:
 
       - name: Publish Maven package
         uses: gradle/[email protected]
+        env:
+          GPG_SECRET_KEY: ${{ secrets.GPG_SECRET_KEY }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
         with:
           arguments: -Pversion=${{ github.event.release.tag_name }} -PmavenUsername=${{ secrets.MAVEN_USERNAME }} -PmavenPassword=${{ secrets.MAVEN_PASSWORD }} publish

build.gradle

@@ -87,6 +87,6 @@ publishing {
 }
 
 signing {
-    useGpgCmd()
+    useInMemoryPgpKeys(System.getenv("GPG_SECRET_KEY"), System.getenv("GPG_PASSPHRASE"))
     sign publishing.publications.mavenJava
 }