Update install.sh

Author: markphip

src/external-repository/install.sh

@@ -18,7 +18,7 @@ EXT_GIT_AZURE_CLIENT_ID="${CLIENTID:-""}"
 EXT_GIT_AZURE_TENANT_ID="${TENANTID:-""}"
 
 EXT_GIT_OIDC_PREBUILD="false"
-if [ -n "${EXT_GIT_AZURE_CLIENT_ID}" && -n "${EXT_GIT_AZURE_TENANT_ID}" ]; then
+if [ -n "${EXT_GIT_AZURE_CLIENT_ID}" ] && [ -n "${EXT_GIT_AZURE_TENANT_ID}" ]; then
     EXT_GIT_OIDC_PREBUILD="true"
 fi