Exclude version_git.jl from list of dependencies for HTML docs

This file is modified by the light-source-dist target when preparing tarballs.
Depending on it means that the docs will be rebuilt when calling 'make install'
from the tarballs. This requires downloading files, which is problematic
for replicable builds and may not be possible on build servers.

Ref #24496
(cherry picked from commit bd019a4)

Makefile

@@ -55,7 +55,7 @@ julia_flisp.boot.inc.phony: julia-deps
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/src julia_flisp.boot.inc.phony
 
 # Build the HTML docs (skipped if already exists, notably in tarballs)
-$(BUILDROOT)/doc/_build/html/en/index.html: $(shell find $(BUILDROOT)/base $(BUILDROOT)/doc \( -path $(BUILDROOT)/doc/_build -o -path $(BUILDROOT)/doc/deps -o -name *_constants.jl -o -name *_h.jl \) -prune -o -type f -print)
+$(BUILDROOT)/doc/_build/html/en/index.html: $(shell find $(BUILDROOT)/base $(BUILDROOT)/doc \( -path $(BUILDROOT)/doc/_build -o -path $(BUILDROOT)/doc/deps -o -name *_constants.jl -o -name *_h.jl -o -name version_git.jl \) -prune -o -type f -print)
 	@$(MAKE) docs
 
 # doc needs to live under $(build_docdir), not under $(build_datarootdir)/julia/