gnu: qtbase: Revert to 6.8.2.

Commit a2b082bbdce updated qtbase to 6.8.3, but apparently even a patch number
increase causes breakage in Qt: qtdeclarative would no longer pass its test
suite. Revert to 6.8.2.

* gnu/packages/qt.scm (qtbase): Downgrade to 6.8.2.

Change-Id: I0fb36756de168d288157103dd30002f0aea8b4d6

gnu/packages/qt.scm

@@ -761,13 +761,13 @@ developers using C++ or QML, a CSS & JavaScript like language.")
   (package
     (inherit qtbase-5)
     (name "qtbase")
-    (version "6.8.3")
+    (version "6.8.2")
     (source (origin
               (inherit (package-source qtbase-5))
               (uri (qt-url name version))
               (sha256
                (base32
-                "100bkvs320s9gim4j7l6wkrl1abz1mwbmwwrscir1fq1as81n02n"))
+                "01gy1p8zvxq8771x6iqkrc7s3kzdddgf1i7xj656w7j1dp746801"))
               (modules '((guix build utils)))
               (snippet
                ;; corelib uses bundled harfbuzz, md4, md5, sha3