Fix dependabot execution

[jbonofre]

Today, even if dependabot is enabled, the daily execution fails with the following error:

updater | 2025/08/29 20:20:58 ERROR <job_1087021425> Error during file fetching; aborting: Is a directory @ io_fread - /home/dependabot/dependabot-updater/repo/specs/java.xml
updater | 2025/08/29 20:20:58 ERROR <job_1087021425> Is a directory @ io_fread - /home/dependabot/dependabot-updater/repo/specs/java.xml
updater | 2025/08/29 20:20:58 ERROR <job_1087021425> /home/dependabot/common/lib/dependabot/file_fetchers/base.rb:235:in 'IO.read'
updater | 2025/08/29 20:20:58 ERROR <job_1087021425> /home/dependabot/common/lib/dependabot/file_fetchers/base.rb:235:in 'Dependabot::FileFetchers::Base#load_cloned_file_if_present'

It seems that a directory in the the source repository is considered as a file by dependabot. I will run locally and investigate.

[snazy]

There's an old dependabot issue (dependabot/dependabot-core#9683), which basically says that dependabot/maven breaks for directories with names that end in .xml. That seems to be the case here as well, as Karaf's directory specs/java.xml matches that pattern (and that name's included in the error messages).

[snazy]

(Sure, dependabot, it's a big surprise having directory names that end in .xml .... 🤦 )

[jbonofre]

@snazy thanks ! Good catch ! I'm fixing that.