Fixed: Parsing of quality in DP.WEB releases

Closes #7079

(cherry picked from commit 9e820144549c12cfc05700642c3a6affcb2be4d2)

src/NzbDrone.Core.Test/ParserTests/QualityParserFixture.cs

@@ -152,6 +152,7 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("[HorribleSubs] Movie Title! 2018 [Web][MKV][h264][720p][AAC 2.0][Softsubs (HorribleSubs)]", false)]
         [TestCase("[HorribleSubs] Movie Title! 2018 [Web][MKV][h264][AAC 2.0][Softsubs (HorribleSubs)]", false)]
         [TestCase("Movie.Title.2013.960p.WEB-DL.AAC2.0.H.264-squalor", false)]
+        [TestCase("Movie.Title.2021.DP.WEB.720p.DDP.5.1.H.264.PLEX", false)]
         public void should_parse_webdl720p_quality(string title, bool proper)
         {
             ParseAndVerifyQuality(title, Source.WEBDL, proper, Resolution.R720p);

src/NzbDrone.Core/Parser/QualityParser.cs

@@ -16,7 +16,7 @@ namespace NzbDrone.Core.Parser
 
         private static readonly Regex SourceRegex = new Regex(@"\b(?:
                                                                 (?<bluray>M?BluRay|Blu-Ray|HD.?DVD|BD(?!$)|UHDBD|BDISO|BDMux|BD25|BD50|BR.?DISK)|
-                                                                (?<webdl>WEB[-_. ]DL(?:mux)?|WEBDL|AmazonHD|iTunesHD|MaxdomeHD|NetflixU?HD|WebHD|[. ]WEB[. ](?:[xh]26[45]|DDP?5[. ]1)|[. ](?-i:WEB)$|(?:\d{3,4}0p)[-. ]WEB[-. ]|[-. ]WEB[-. ]\d{3,4}0p|\b\s\/\sWEB\s\/\s\b|AMZN[. -]WEB[. -]|NF[. ]WEB[. ])|
+                                                                (?<webdl>WEB[-_. ]DL(?:mux)?|WEBDL|AmazonHD|iTunesHD|MaxdomeHD|NetflixU?HD|WebHD|[. ]WEB[. ](?:[xh]26[45]|DDP?5[. ]1)|[. ](?-i:WEB)$|(?:\d{3,4}0p)[-. ]WEB[-. ]|[-. ]WEB[-. ]\d{3,4}0p|\b\s\/\sWEB\s\/\s\b|(?:AMZN|NF|DP)[. -]WEB[. -])|
                                                                 (?<webrip>WebRip|Web-Rip|WEBMux)|
                                                                 (?<hdtv>HDTV)|
                                                                 (?<bdrip>BDRip|BDLight)|