Revert RUBY_MAJOR refactoring for security updates

We'll catch these in the next release of 3.1, and we will avoid applying them for 3.0 at all (since it's effectively EOL now except the possibility of a severe regression: https://www.ruby-lang.org/en/news/2024/04/23/ruby-3-0-7-released/).

Author: tianon

3.0/alpine3.16/Dockerfile

@@ -50,13 +50,13 @@ RUN set -eux; \
 	} >> /usr/local/etc/gemrc
 
 ENV LANG C.UTF-8
-{{ if .version | . == "3.0.6" or . == "3.1.4" or . == "3.2.2" then ( -}}
+
+# https://www.ruby-lang.org/{{ .post | ltrimstr("/") }}
+{{ if env.version == "3.0" or .version == "3.1.5" then ( -}}
 ENV RUBY_MAJOR {{ env.version }}
 ENV RUBY_VERSION {{ .version }}
 ENV RUBY_DOWNLOAD_SHA256 {{ .sha256.xz }}
 {{ ) else ( -}}
-
-# https://www.ruby-lang.org/{{ .post | ltrimstr("/") }}
 ENV RUBY_VERSION {{ .version }}
 ENV RUBY_DOWNLOAD_URL {{ .url.xz }}
 ENV RUBY_DOWNLOAD_SHA256 {{ .sha256.xz }}
@@ -203,7 +203,7 @@ RUN set -eux; \
 	fi; \
 {{ ) else "" end -}}
 	\
-{{ if .version | . == "3.0.6" or . == "3.1.4" or . == "3.2.2" then ( -}}
+{{ if env.version == "3.0" or .version == "3.1.5" then ( -}}
 {{ if .url.xz != "https://cache.ruby-lang.org/pub/ruby/\(env.version | rtrimstr("-rc"))/ruby-\(.version).tar.xz" then error("url for \(.version) is not as expected!") else "" end -}}
 	wget -O ruby.tar.xz "https://cache.ruby-lang.org/pub/ruby/${RUBY_MAJOR%-rc}/ruby-$RUBY_VERSION.tar.xz"; \
 {{ ) else ( -}}