fix: add java to gh workflow

.github/workflows/stacks-blockchain-api.yml

@@ -43,6 +43,12 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '9.0.4'
+          java-package: jdk
+          architecture: x64
+
       - uses: actions/cache@v1
         with:
           path: ~/.npm
@@ -107,6 +113,12 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '9.0.4'
+          java-package: jdk
+          architecture: x64
+
       - name: Use Node.js
         uses: actions/setup-node@v1
         with:
@@ -148,6 +160,12 @@ jobs:
         with:
           token: ${{ secrets.GH_TOKEN }}
 
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '9.0.4'
+          java-package: jdk
+          architecture: x64
+
       - name: Semantic Release
         uses: cycjimmy/semantic-release-action@v2.5.0
         id: semantic