AWS - Fix ErrorProne warning of malformed Javadoc

[kbendick]

Noticed this error prone warning when checking my work for warnings.

This fixes the malformed JavaDoc on the GLUE_CATALOG_ENDPOINT configuration constant.

> Task :iceberg-aws:compileJava
/Users/kylebendickson/repos/iceberg/aws/src/main/java/org/apache/iceberg/aws/AwsProperties.java:130: warning: [AlmostJavadoc] This comment contains Javadoc or HTML tags, but isn't started with a double asterisk (/**); is it meant to be Javadoc?
  public static final String GLUE_CATALOG_ENDPOINT = "glue.endpoint";
                             ^
    (see https://errorprone.info/bugpattern/AlmostJavadoc)
  Did you mean '/**'?

[kbendick]

Sorry looked at the wrong git blame:

cc @naushadh @amogh-jahagirdar

[amogh-jahagirdar]

Ah thanks for cleaning this up! LGTM

[xiaoxuandev]

Thanks for the fix!

[aokolnychyi]

Nice catch, @kbendick!