[main] Update dependabot configurations

Author: serverless-qe

.github/dependabot.yml

@@ -42,9 +42,9 @@ updates:
                 - minor
                 - major
             applies-to: security-updates
-      target-branch: release-v1.15
+      target-branch: release-v1.16
       commit-message:
-        prefix: '[release-v1.15][gomod]'
+        prefix: '[release-v1.16][gomod]'
       open-pull-requests-limit: 10
     - package-ecosystem: gomod
       directories:
@@ -88,9 +88,9 @@ updates:
                 - minor
                 - major
             applies-to: security-updates
-      target-branch: release-v1.16
+      target-branch: release-v1.17
       commit-message:
-        prefix: '[release-v1.16][gomod]'
+        prefix: '[release-v1.17][gomod]'
       open-pull-requests-limit: 10
     - package-ecosystem: gomod
       directories:
@@ -134,9 +134,9 @@ updates:
                 - minor
                 - major
             applies-to: security-updates
-      target-branch: release-v1.17
+      target-branch: release-v1.21
       commit-message:
-        prefix: '[release-v1.17][gomod]'
+        prefix: '[release-v1.21][gomod]'
       open-pull-requests-limit: 10
     - package-ecosystem: gomod
       directories:
@@ -180,7 +180,7 @@ updates:
                 - minor
                 - major
             applies-to: security-updates
-      target-branch: release-v1.21
+      target-branch: release-v1.22
       commit-message:
-        prefix: '[release-v1.21][gomod]'
+        prefix: '[release-v1.22][gomod]'
       open-pull-requests-limit: 10