ci: retry cargo network ops to survive transient crates.io blips

'cargo install cargo-dist' downloads ~400 crates; a single transient
crates.io failure (HTTP/2 framing-layer error) killed the whole install.
Set CARGO_NET_RETRY=10 and CARGO_HTTP_MULTIPLEXING=false (HTTP/1.1) so
downloads retry and avoid the HTTP/2 framing errors.

Author: reedchan7

.github/workflows/release.yml

@@ -17,6 +17,13 @@ name: Release
 permissions:
   "contents": "write"
 
+# Harden cargo network ops against transient crates.io failures while
+# 'cargo install cargo-dist' downloads/compiles its deps (HTTP/2 framing-layer
+# errors, dropped crate downloads). Retry downloads and force HTTP/1.1.
+env:
+  CARGO_NET_RETRY: "10"
+  CARGO_HTTP_MULTIPLEXING: "false"
+
 # This task will run whenever you push a git tag that looks like a version
 # like "1.0.0", "v0.1.0-prerelease.1", "my-app/0.1.0", "releases/v1.0.0", etc.
 # Various formats will be parsed into a VERSION and an optional PACKAGE_NAME, where