Dockerfile: update the bootstrap version to go1.20
This unbreaks the gotip build.
Change-Id: Ic251015d0b58dc12fd4e5f38350a16a2fd3e103c
Reviewed-on: https://go-review.googlesource.com/c/playground/+/517295
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
diff --git a/Dockerfile b/Dockerfile
index 668b68b..d3f60ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,7 +22,7 @@
ENV GOPATH /go
ENV GOROOT_BOOTSTRAP=/usr/local/go-bootstrap
-ENV GO_BOOTSTRAP_VERSION go1.18
+ENV GO_BOOTSTRAP_VERSION go1.20.6
ARG GO_VERSION
ENV GO_VERSION ${GO_VERSION}