Fix formatting of errors in issue repository

[nforro]

This is an example of a reported Bodhi update failure (from packit/specfile#194):

dist-git branch	error
epel9	``` There is a problem with creating a bodhi update:
{"status": "error", "errors": [{"location": "body", "name": "builds", "description": "Cannot find any tags associated with build: python-specfile-0.13.1-1.el9"}, {"location": "body", "name": "builds", "description": "Cannot find release associated with build: python-specfile-0.13.1-1.el9, tags: []"}]} ```

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Tasks:

• Make sure there are no newlines that would break formatting
• Extract only error description from the exception