Remove newlines from Fedora dependencies list in install

Prevents copy-pasting dependencies line to terminal in one shot

INSTALL

@@ -362,13 +362,7 @@ new subdirectory called `build` or `build-qt5` in it.
     3.9.1. Install build dependencies
     =================================
 
-  dnf install qt5-qtwebkit-devel qt5-qtlocation-devel qt5-qttools-static
-  qt5-qtscript-devel qca-qt5-devel python3-qt5-devel python3-qscintilla-qt5-devel 
-  qscintilla-qt5-devel python3-qscintilla-devel python3-qscintilla-qt5
-  clang flex bison geos-devel gdal-devel sqlite-devel libspatialite-devel
-  qt5-qtsvg-devel qt5-qtxmlpatterns-devel spatialindex-devel expat-devel proj-devel
-  qwt-qt5-devel gsl-devel postgresql-devel cmake python3-future gdal-python3
-  python3-psycopg2 python3-PyYAML qca-qt5-ossl qwt-devel qtkeychain-qt5-devel
+  dnf install qt5-qtwebkit-devel qt5-qtlocation-devel qt5-qttools-static qt5-qtscript-devel qca-qt5-devel python3-qt5-devel python3-qscintilla-qt5-devel qscintilla-qt5-devel python3-qscintilla-devel python3-qscintilla-qt5 clang flex bison geos-devel gdal-devel sqlite-devel libspatialite-devel qt5-qtsvg-devel qt5-qtxmlpatterns-devel spatialindex-devel expat-devel proj-devel qwt-qt5-devel gsl-devel postgresql-devel cmake python3-future gdal-python3 python3-psycopg2 python3-PyYAML qca-qt5-ossl qwt-devel qtkeychain-qt5-devel
 
 To build QGIS server additional dependencies are required: