classic: fix vertical spacing of onecolentry environment

rendercv/themes/classic/Preamble.j2.tex

@@ -47,7 +47,7 @@
 ((* elif design.text_alignment == "left-aligned" *))
 \raggedright
 ((* endif *))
-
+\AtBeginEnvironment{adjustwidth}{\partopsep0pt} % remove space before adjustwidth environment
 \pagestyle{empty} % no header or footer
 \setcounter{secnumdepth}{0} % no section numbering
 \setlength{\parindent}{0pt} % no indentation
@@ -106,7 +106,7 @@
 }{
     \end{itemize}
             
-    \vspace{-0.20cm}
+    \vspace{-0.10cm}
 } % new environment for highlights