ci(deps): update alpine docker tag to v3.18.2 (#150)

Co-authored-by: Michael Kriese <michael.kriese@gmx.de>
Reviewed-on: https://codeberg.org/forgejo-contrib/forgejo-helm/pulls/150

.woodpecker/release-version.yml

@@ -10,7 +10,7 @@ when:
 
 pipeline:
   generate-chart:
-    image: alpine:3.18.0
+    image: alpine:3.18.2
     pull: true
     commands:
       - apk add git nodejs npm helm
@@ -36,7 +36,7 @@ pipeline:
       target: main
 
   publish-chart:
-    image: alpine:3.18.0
+    image: alpine:3.18.2
     pull: true
     commands:
       - apk add helm