Upgrade base-image and groovy-spock

compressed.image_sizes.sorted

@@ -22,7 +22,6 @@
 289200246 cyberdojofoundation/r_runit:7b1a16f 275.80 MiB
 274076859 cyberdojofoundation/kotlin_test:857e4fa 261.37 MiB
 265024434 cyberdojofoundation/rust_test:1e0565d 252.74 MiB
-258873928 cyberdojofoundation/groovy_spock:4310491 246.88 MiB
 227987976 cyberdojofoundation/bcpl_all_tests_passed:cb2166b 217.42 MiB
 203586820 cyberdojofoundation/go_testify:3f62bba 194.15 MiB
 201525368 cyberdojofoundation/python_approval_pytest:b2ce469 192.18 MiB
@@ -39,6 +38,7 @@
 181233199 cyberdojofoundation/coffeescript_jasmine:61aae85 172.83 MiB
 180765138 cyberdojofoundation/julia_test:81ccc5d 172.39 MiB
 171194112 cyberdojofoundation/freepascal_assert:71a06f3 163.26 MiB
+151973306 cyberdojofoundation/groovy_spock:3f31945 144.93 MiB
 151167851 cyberdojofoundation/groovy_junit:7224257 144.16 MiB
 142502440 cyberdojofoundation/go_convey:f7e690a 135.90 MiB
 132571842 cyberdojofoundation/go_testing:a2dbf73 126.42 MiB

git_repo_urls.tagged

@@ -39,7 +39,7 @@ d170f1e@https://github.com/cyber-dojo-start-points/gplusplus-catch
 4028e68@https://github.com/cyber-dojo-start-points/gplusplus-googletest
 19e1efa@https://github.com/cyber-dojo-start-points/gplusplus-igloo
 17b9020@https://github.com/cyber-dojo-start-points/groovy-junit
-b7b4bb5@https://github.com/cyber-dojo-start-points/groovy-spock
+ae4b209@https://github.com/cyber-dojo-start-points/groovy-spock
 2213ef2@https://github.com/cyber-dojo-start-points/haskell-hunit
 88887e5@https://github.com/cyber-dojo-start-points/java-approval
 988c847@https://github.com/cyber-dojo-start-points/java-cucumberpico