bad url: sitemap url value trails with bad characters #249

Verified during a gleaner run that not all sitemap urls would transfer to S3 in summoned/ subdirectory. Upon inspection from the following error it appears that internal/summoner/sitemaps/sitemap_ng.go:DomainSitemap() for some reason appends bad characters (i.e. \u003nil\0003e) to URL causing gleaner to be unable to fetch with following error (example):

logs/gleaner-2023-12-20-20-44-34.log:{"file":"/home/runner/work/gleaner/gleaner/internal/summoner/acquire/acquire.go:299","func":"github.com/gleanerio/gleaner/internal/summoner/acquire.getDomain.func2","level":"error","msg":"#112 bad url https://geoconnex.us/ca-gage-assessment/gages/LMN\u003cnil\u003e","time":"2023-12-20T20:44:48Z"}

The code attempts to fix this extraneous trailing whitespace by performing strings.Trimpspace but it doesn't remove these characters evidently.