fix(sql): Yaml parse bug in liquibase changelog file

[jervi]

A bug was introduced here: https://github.com/spinnaker/orca/pull/4620/files#diff-ee59a85cbdc61d39167704f4b52d85914400ef9e6ae4ad843f56a796877ae271R56. It causes an Orka crash on startup.

org.yaml.snakeyaml.scanner.ScannerException: mapping values are not allowed here
  in 'reader', line 57, column 9:
         file: changelog/20201214-create-comp ...
             ^
     at org.yaml.snakeyaml.scanner.ScannerImpl.fetchValue(ScannerImpl.java:869)
     at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:358)
     at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:227)
     at org.yaml.snakeyaml.parser.ParserImpl$ParseIndentlessSequenceEntry.produce(ParserImpl.java:530)
     at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158)
     at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
     at org.yaml.snakeyaml.composer.Composer.composeSequenceNode(Composer.java:208)
     at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
     at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:257)
     at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:248)
     at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:236)
     at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:162)
     at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:95)
     at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:119)
     at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:150)
     at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:490)
     at org.yaml.snakeyaml.Yaml.load(Yaml.java:429)
     at liquibase.parser.core.yaml.YamlChangeLogParser.parseYamlStream(YamlChangeLogParser.java:101)

[dbyron-sf]

@Mergifyio update

[mergify]

update

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[dbyron-sf]

Weird that this didn't break in the PR build. Thanks for catching it!