Update pack to v0.29.0 (#14)

Author: kondoumh

Dockerfile

@@ -1,6 +1,6 @@
 FROM docker:20.10.21-dind
 
-ENV VERSION=v0.27.0
+ENV VERSION=v0.29.0
 
 RUN apk add --update --no-cache curl bash && \
     curl -LO https://github.com/buildpacks/pack/releases/download/${VERSION}/pack-${VERSION}-linux.tgz && \

README.md

@@ -23,7 +23,7 @@ on: [push]
     - name: Push image
 ```
 
-> buildpacks v0.27.0 will be executed.
+> buildpacks/pack v0.29.0 will be executed.
 
 ## Inputs
 - `image` : (required) Name of container image.