use seedling emoji for dependabot PRs

this commit adds seedling prefix in the PR title whenever dependabot
opens a PR to update deps.

Signed-off-by: Anurag <[email protected]>

Author: kranurag7

.github/dependabot.yml

@@ -4,24 +4,34 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: ":seedling:"
 
   - package-ecosystem: "docker"
     directory: "/"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: ":seedling:"
 
   # Enable version updates for Go tools
   - package-ecosystem: "gomod"
     directory: "/hack/tools"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: ":seedling:"
 
   - package-ecosystem: "docker"
     directory: "/hack/tools"
     schedule:
       interval: "weekly"
+    commit-message:
+      prefix: ":seedling:"
 
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "daily"
+    commit-message:
+      prefix: ":seedling:"