Support 'yml' as language identifier for yaml in language identifier comment

IntelliJ treats both 'yaml' and 'yml' as YAML content.

**Prettier-Java 2.10.3**

```sh
# Options (if any):
--print-width 80
```

**Input:**

```java
// language=yaml
String yaml = """
spring:
data:
jpa:
repositories:
bootstrap-mode: deferred
""";

// language=yml
String yml = """
spring:
data:
jpa:
repositories:
bootstrap-mode: deferred
""";

```

**Output:**

```java
// language=yaml
String yaml = """
spring:
data:
jpa:
repositories:
bootstrap-mode: deferred
""";

// language=yml
String yml = """
spring:
data:
jpa:
repositories:
bootstrap-mode: deferred
""";

```

**Expected behavior:**

Start by locating the language-identifier handling used for Java text blocks and compare the existing yaml path with the yml example. Confirm the change when the yml block is formatted like the yaml block shown in the issue.

Written by the indexing model from the issue text.