fix(ci): fixed release-please manifest (#13810)

Signed-off-by: Vladyslav Diachenko <vlad.diachenko@grafana.com>
(cherry picked from commit f253db5)

Author: vlad-diachenko

.release-please-manifest.json

@@ -1,4 +1,4 @@
 {
-  ".": "3.0.0",
+  ".": "3.1.0",
   "operator": "0.6.1"
 }