Update cosign@latest to 3.0.6

CHANGELOG.md

@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `cosign@latest` to 3.0.6.
+
 ## [2.75.0] - 2026-04-07
 
 - Support `cosign`. ([#1677](https://github.com/taiki-e/install-action/pull/1677))

manifests/cosign.json

@@ -28,13 +28,13 @@
   },
   "license_markdown": "[Apache-2.0](https://github.com/sigstore/cosign/blob/main/LICENSE)",
   "latest": {
-    "version": "3.0.5"
+    "version": "3.0.6"
   },
   "3": {
-    "version": "3.0.5"
+    "version": "3.0.6"
   },
   "3.0": {
-    "version": "3.0.5"
+    "version": "3.0.6"
   },
   "3.0.6": {
     "x86_64_linux_musl": {