fix github build: replace set-env

Signed-off-by: Oleksii Moskalenko <[email protected]>

Author: pyalex

.github/workflows/master_only.yml

@@ -37,7 +37,7 @@ jobs:
             docker push gcr.io/kf-feast/feast-${{ matrix.component }}:develop
           fi
       - name: Get version
-        run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF#refs/*/}
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
       - name: Push versioned Docker image
         run: |
           source infra/scripts/setup-common-functions.sh

serving/pom.xml

@@ -30,14 +30,6 @@
   <name>Feast Serving</name>
   <description>Feature serving API service</description>
 
-  <repositories>
-    <repository>
-      <id>spring-plugins</id>
-      <name>Spring Plugins</name>
-      <url> https://repo.spring.io/plugins-release</url>
-    </repository>
-  </repositories>
-
   <build>
     <plugins>
       <plugin>