fixup! (PA-6677) Restore support for AL2 x86_64 install_shell task

Author: joshcooper

tasks/install_shell.sh

@@ -659,9 +659,9 @@ case $platform in
     platform_package="el"
     arch="$(uname -p)"
     # Install amazon packages on AL2 (only aarch64) and 2003 and up (all arch)
-    if (( $platform_version == 2 && $arch == 'x86_64' )); then
+    if [[ $platform_version == 2 && $arch == 'x86_64' ]]; then
       platform_version="7"
-    elif (( $platform_version == 2 || $platform_version >= 2023 )); then
+    elif (( platform_version == 2 || platform_version >= 2023 )); then
       platform_package="amazon"
     fi
     filename="${collection}-release-${platform_package}-${platform_version}.noarch.rpm"