feat(Rust): Add Alpine 3.20 variant

[Muscraft]

This adds an Alpine 3.20 variant for Rust.

See rust-lang/docker-rust#202

[github-actions]

Diff for 3b5adf3:

diff --git a/_bashbrew-cat b/_bashbrew-cat
index b528e52..807be9c 100644
--- a/_bashbrew-cat
+++ b/_bashbrew-cat
@@ -1,15 +1,15 @@
 Maintainers: Steven Fackler <[email protected]> (@sfackler), Scott Schafer <[email protected]> (@Muscraft)
 GitRepo: https://github.com/rust-lang/docker-rust.git
 
-Tags: 1-alpine3.18, 1.78-alpine3.18, 1.78.0-alpine3.18, alpine3.18
+Tags: 1-alpine3.19, 1.78-alpine3.19, 1.78.0-alpine3.19, alpine3.19
 Architectures: amd64, arm64v8
 GitCommit: cc31986e1dfe94671c639231ecf0503942c121d9
-Directory: 1.78.0/alpine3.18
+Directory: 1.78.0/alpine3.19
 
-Tags: 1-alpine3.19, 1.78-alpine3.19, 1.78.0-alpine3.19, alpine3.19, 1-alpine, 1.78-alpine, 1.78.0-alpine, alpine
+Tags: 1-alpine3.20, 1.78-alpine3.20, 1.78.0-alpine3.20, alpine3.20, 1-alpine, 1.78-alpine, 1.78.0-alpine, alpine
 Architectures: amd64, arm64v8
-GitCommit: cc31986e1dfe94671c639231ecf0503942c121d9
-Directory: 1.78.0/alpine3.19
+GitCommit: e2c6ff15ac68eb3ca95d05c491a48127936b40bd
+Directory: 1.78.0/alpine3.20
 
 Tags: 1-bookworm, 1.78-bookworm, 1.78.0-bookworm, bookworm, 1, 1.78, 1.78.0, latest
 Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
diff --git a/_bashbrew-list b/_bashbrew-list
index 7aaf3fe..7e75c9b 100644
--- a/_bashbrew-list
+++ b/_bashbrew-list
@@ -1,7 +1,7 @@
 rust:1
 rust:1-alpine
-rust:1-alpine3.18
 rust:1-alpine3.19
+rust:1-alpine3.20
 rust:1-bookworm
 rust:1-bullseye
 rust:1-buster
@@ -11,8 +11,8 @@ rust:1-slim-bullseye
 rust:1-slim-buster
 rust:1.78
 rust:1.78-alpine
-rust:1.78-alpine3.18
 rust:1.78-alpine3.19
+rust:1.78-alpine3.20
 rust:1.78-bookworm
 rust:1.78-bullseye
 rust:1.78-buster
@@ -22,8 +22,8 @@ rust:1.78-slim-bullseye
 rust:1.78-slim-buster
 rust:1.78.0
 rust:1.78.0-alpine
-rust:1.78.0-alpine3.18
 rust:1.78.0-alpine3.19
+rust:1.78.0-alpine3.20
 rust:1.78.0-bookworm
 rust:1.78.0-bullseye
 rust:1.78.0-buster
@@ -32,8 +32,8 @@ rust:1.78.0-slim-bookworm
 rust:1.78.0-slim-bullseye
 rust:1.78.0-slim-buster
 rust:alpine
-rust:alpine3.18
 rust:alpine3.19
+rust:alpine3.20
 rust:bookworm
 rust:bullseye
 rust:buster
diff --git a/rust_alpine/Dockerfile b/rust_alpine/Dockerfile
index 47e6f88..7087296 100644
--- a/rust_alpine/Dockerfile
+++ b/rust_alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.19
+FROM alpine:3.20
 
 LABEL org.opencontainers.image.source=https://github.com/rust-lang/docker-rust
 
diff --git a/rust_alpine3.18/Dockerfile b/rust_alpine3.18/Dockerfile
deleted file mode 100644
index cb91312..0000000
diff --git a/rust_alpine/Dockerfile b/rust_alpine3.19/Dockerfile
similarity index 100%
copy from rust_alpine/Dockerfile
copy to rust_alpine3.19/Dockerfile

Relevant Maintainers:

• rust: @sfackler @Muscraft