chore(renovate): only support most two recent releases 0.31 and 0.32 (#5220)

Signed-off-by: Rui Chen <[email protected]>
Signed-off-by: Lukas Peter Aldershaab <[email protected]>

Author: chenrui333

Diff for: .github/renovate.json5

@@ -9,7 +9,8 @@
   automerge: true,
   baseBranches: [
     'main',
-    '/^release-.*/',
+    'release-0.31',
+    'release-0.32',
   ],
   platformAutomerge: true,
   labels: [