doctest: Use 1.0 branch instead of main (#4219)

Signed-off-by: Simeon Widdis <[email protected]>

Author: Swiddis

doctest/build.gradle

@@ -26,8 +26,8 @@ task cloneSqlCli(type: Exec) {
 
     if (repoDir.exists()) {
         // Repository already exists, fetch and checkout latest
-        commandLine 'git', '-C', repoDir.absolutePath, 'fetch', 'origin', 'main'
-        commandLine 'git', '-C', repoDir.absolutePath, 'checkout', 'origin/main'
+        commandLine 'git', '-C', repoDir.absolutePath, 'fetch', 'origin', '1.0-legacy'
+        commandLine 'git', '-C', repoDir.absolutePath, 'checkout', 'origin/1.0-legacy'
     } else {
         // Repository doesn't exist, clone it
         commandLine 'git', 'clone', 'https://github.com/opensearch-project/sql-cli.git', repoDir.absolutePath