default cosign to 1.9.0 release (#80)

Signed-off-by: cpanato <ctadeu@gmail.com>

README.md

@@ -15,7 +15,7 @@ Add the following entry to your Github workflow YAML file:
 ```yaml
 uses: sigstore/cosign-installer@main
 with:
-  cosign-release: 'v1.8.0' # optional
+  cosign-release: 'v1.9.0' # optional
 ```
 
 Example using a pinned version:

action.yml

@@ -10,7 +10,7 @@ inputs:
   cosign-release:
     description: 'cosign release version to be installed'
     required: false
-    default: 'v1.8.0'
+    default: 'v1.9.0'
   install-dir:
     description: 'Where to install the cosign binary'
     required: false
@@ -61,13 +61,13 @@ runs:
           esac
         }
 
-        bootstrap_version='v1.8.0'
-        bootstrap_linux_amd64_sha='5682ad5a0262a4b51883c76d2134f036f2c5ac0b1e3ee8f37b78a45e296e09f6'
-        bootstrap_linux_arm_sha='3504f5ff57dc8aeba508a96e2618f800af379d370a4c86d626c5d69ff5b52237'
-        bootstrap_linux_arm64_sha='285da80143c84483bee92471f25b36f0310d7e28688741d37ceeec53214a183b'
-        bootstrap_darwin_amd64_sha='78ea0bbbbd851c7e7b407c7b784c5857709be5e680be77b44b32d7e716695b41'
-        bootstrap_darwin_arm64_sha='50e151ae242e663b51aa109a9d74849f3e235a8b7d33293fb80d784ffceb807f'
-        bootstrap_windows_amd64_sha='d274f4baa3ebd11308c8486379759c96071ae58c852078fff0e4952205d92f00'
+        bootstrap_version='v1.9.0'
+        bootstrap_linux_amd64_sha='47e2596a38e619b72e736fd171eeeaadaf6bd22d6e87a767b339168a87b62761'
+        bootstrap_linux_arm_sha='53410c1f40aded9511b5512044790b454b4cdf68233beee49082868b75e78c5b'
+        bootstrap_linux_arm64_sha='abd7ec116dd7e7980f08e67d2c7478ae1cdc97adf778aff76d8a737a908670d8'
+        bootstrap_darwin_amd64_sha='84a603503f843ee0ea1b394d685c221b192909aacc9312d05a709b0fab184b47'
+        bootstrap_darwin_arm64_sha='6d81b807b847bff1454573bc8ddfdbb95b4df2dfbbcc5bf91e93cd526a9f7d93'
+        bootstrap_windows_amd64_sha='62dd10f56b939409267033282aae54ab6ec466270c12b3e0db15c3f41a0c12d1'
         cosign_executable_name=cosign
 
         trap "popd >/dev/null" EXIT