8.8.0_2 with nghttp3 1.4.0, ngtcp2 1.6.0

Also:

- toolchain and debian image updates.

- curl -V will display the URL to the patch-set applied
  to these curl builds. At the moment we no patches, but
  it will look like this:
  ```
  curl 8.8.0 (x86_64-alpine-linux-musl) libcurl/8.8.0 LibreSSL/3.9.2 zlib/1.3.1 brotli/1.1.0 zstd/1.5.6 libpsl/0.21.5 libssh2/1.11.0 nghttp2/1.62.1 ngtcp2/1.5.0 nghttp3/1.3.0
  Release-Date: 2024-05-22, security patched: https://github.com/curl/curl-for-win/blob/8bb77c8/curl.patch
  Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
  Features: alt-svc AsynchDNS brotli HSTS HTTP2 HTTP3 HTTPS-proxy IPv6 Largefile libz NTLM PSL SSL threadsafe UnixSockets zstd
  ```
  Discussion: curl/curl#13869

_versions.sh

@@ -10,7 +10,7 @@ export CURL_HASH=0f58bb95fc330c8a46eeb3df5701b0d90c9d9bfcc42bd1cd08791d12551d440
 # Create revision string
 # NOTE: Set _REV to 1 after bumping CURL_VER_, then increment for each
 #       CI rebuild via `main` branch push (e.g. after bumping a dependency).
-export _REV="${CW_REVISION:-1}"
+export _REV="${CW_REVISION:-2}"
 
 export TRURL_VER_='0.13'
 export TRURL_HASH=8ceeb09d0e08dc677897f26651aa625d9ad18021f881f9d5f31e5a95bb3cc047