.cirrus.yml: use Go 1.24

Also:
1. Change GO_VERSION to GO_VER_PREFIX, and move the "." from the jq
   argument to the variable value. It allows to use something like
   "1.25" to match "1.25rc" etc, but set to "1.24." for now to require
   a released 1.24.x version.

2. Change PREFIX to URL_PREFIX.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.cirrus.yml

@@ -77,7 +77,7 @@ task:
   env:
     HOME: /root
     CIRRUS_WORKING_DIR: /home/runc
-    GO_VERSION: "1.23"
+    GO_VER_PREFIX: "1.24."
     BATS_VERSION: "v1.9.0"
     RPMS: gcc git iptables jq glibc-static libseccomp-devel make criu fuse-sshfs container-selinux
     # yamllint disable rule:key-duplicates
@@ -117,10 +117,10 @@ task:
     [ $? -eq 0 ] # fail if yum failed
 
     # Install Go.
-    PREFIX="https://go.dev/dl/"
+    URL_PREFIX="https://go.dev/dl/"
     # Find out the latest minor release URL.
-    filename=$(curl -fsSL "${PREFIX}?mode=json&include=all" | jq -r --arg Ver "go$GO_VERSION." '. | map(select(.version | contains($Ver))) | first | .files[] | select(.os == "linux" and .arch == "amd64" and .kind == "archive") | .filename')
-    curl -fsSL "$PREFIX$filename" | tar Cxz /usr/local
+    filename=$(curl -fsSL "${URL_PREFIX}?mode=json&include=all" | jq -r --arg Ver "go$GO_VER_PREFIX" '. | map(select(.version | contains($Ver))) | first | .files[] | select(.os == "linux" and .arch == "amd64" and .kind == "archive") | .filename')
+    curl -fsSL "$URL_PREFIX$filename" | tar Cxz /usr/local
     # install bats
     cd /tmp
     git clone https://github.com/bats-core/bats-core