Escape the all the quotation marks (" --> \") in docs/build-templates.
The scripts are *bash evaluated* (e.g)::
eval "echo \"$(< "${REPO_ROOT}/docs/build-templates/searx.rst")\""
Backslash, quotation marks and other need to be escaped.
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>