Update only org.springframework dependencies

Issue gh-138

.github/dependabot.yml

@@ -4,22 +4,32 @@ updates:
 
   - package-ecosystem: "gradle"
     target-branch: "main"
-    directory: "/"
+    directory: "/gradle"
     schedule:
       interval: "weekly"
       time: "03:00"
       timezone: "Etc/UTC"
+    allow:
+      - dependency-name: "org.springframework*"
+        dependency-type: "all"
+      - dependency-name: "io.spring*"
+        dependency-type: "all"
     ignore:
       - dependency-name: "*"
         update-types: [ "version-update:semver-major", "version-update:semver-minor" ]
 
   - package-ecosystem: "gradle"
     target-branch: "6.1.x"
-    directory: "/"
+    directory: "/gradle"
     schedule:
       interval: "weekly"
       time: "03:00"
       timezone: "Etc/UTC"
+    allow:
+      - dependency-name: "org.springframework*"
+        dependency-type: "all"
+      - dependency-name: "io.spring*"
+        dependency-type: "all"
     ignore:
       - dependency-name: "*"
         update-types: [ "version-update:semver-major", "version-update:semver-minor" ]