Pass string views by value

string_view should always be passed by value;  This commit is a sed
replace of the code to make all string_views pass by value, per general
coding guidelines[1].

[1] https://quuxplusone.github.io/blog/2021/11/09/pass-string-view-by-value/

Tested: Code compiles.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I55b342a29a0fbfce0a4ed9ea63db6014d03b134c
diff --git a/include/security_headers.hpp b/include/security_headers.hpp
index d724de4..9877bb0 100644
--- a/include/security_headers.hpp
+++ b/include/security_headers.hpp
@@ -58,7 +58,7 @@
                                                  "object-src *; "
                                                  "base-uri *");
 
-        const std::string_view origin = req.getHeaderValue("Origin");
+        std::string_view origin = req.getHeaderValue("Origin");
         res.addHeader(bf::access_control_allow_origin, origin);
         res.addHeader(bf::access_control_allow_methods, "GET, "
                                                         "POST, "