feat: Add libicu dependency to RPM spec file (#781)

(cherry picked from commit f312895ef8c77098612645a54420539fef70a849)
(cherry picked from commit 6621490)

Author: stone-w4tch3r

build/resources/rpm/SPECS/build.spec

@@ -7,6 +7,7 @@ URL: https://sourcegit-scm.github.io/
 Source: https://github.com/sourcegit-scm/sourcegit/archive/refs/tags/v%_version.tar.gz
 Requires: libX11.so.6()(%{__isa_bits}bit)
 Requires: libSM.so.6()(%{__isa_bits}bit)
+Requires: libicu
 
 %define _build_id_links none