fix: bump Linux arch-detection version gate to 4.2.0

4.1.0 is already released without arch-specific Linux archives,
so the gate needs to target 4.2.0 when they'll first be available.

Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>

Author: zimeg

scripts/install-dev.sh

@@ -144,7 +144,7 @@ install_slack_cli() {
                         esac
                 fi
         elif [ "$(expr substr "$(uname -s)" 1 5)" == "Linux" ]; then
-                if version_lt "$SLACK_CLI_DEV_VERSION" "4.1.0"; then
+                if version_lt "$SLACK_CLI_DEV_VERSION" "4.2.0"; then
                         slack_cli_url="https://downloads.slack-edge.com/slack-cli/slack_cli_${SLACK_CLI_DEV_VERSION}_linux_64-bit.tar.gz"
                 else
                         case "$(uname -m)" in

scripts/install.sh

@@ -146,7 +146,7 @@ install_slack_cli() {
                         esac
                 fi
         elif [ "$(expr substr "$(uname -s)" 1 5)" == "Linux" ]; then
-                if version_lt "$SLACK_CLI_VERSION" "4.1.0"; then
+                if version_lt "$SLACK_CLI_VERSION" "4.2.0"; then
                         slack_cli_url="https://downloads.slack-edge.com/slack-cli/slack_cli_${SLACK_CLI_VERSION}_linux_64-bit.tar.gz"
                 else
                         case "$(uname -m)" in