fix: upgrade go version in redirector and renovate.json

cmd/redirector/go.mod

@@ -1,5 +1,5 @@
 module redirector
 
-go 1.12
+go 1.26
 
 require github.com/pkg/errors v0.8.1

cmd/redirector/main.go

@@ -85,7 +85,7 @@ func redirect(w http.ResponseWriter, req *http.Request) {
 		r, err := parseReferer(referer, availableExtractors)
 		if err != nil {
 			w.WriteHeader(http.StatusBadRequest)
-			fmt.Fprintf(w, errors.Wrapf(err, "failed to parse %s header", hdrReferer).Error())
+			fmt.Fprint(w, errors.Wrapf(err, "failed to parse %s header", hdrReferer).Error())
 			return
 		}
 		repo = r
@@ -150,13 +150,13 @@ func manualRedirect(w http.ResponseWriter, req *http.Request) {
 	origQuery, err := url.ParseQuery(req.FormValue("orig_query"))
 	if err != nil {
 		w.WriteHeader(http.StatusBadRequest)
-		fmt.Fprintf(w, errors.Wrapf(err, "failed to parse orig_query=%q: %v", origQuery, err).Error())
+		fmt.Fprint(w, errors.Wrapf(err, "failed to parse orig_query=%q: %v", origQuery, err).Error())
 		return
 	}
 	repo, err := parseReferer(refURL, availableExtractors)
 	if err != nil {
 		w.WriteHeader(http.StatusBadRequest)
-		fmt.Fprintf(w, errors.Wrapf(err, "failed to parse url into a github repository: %s", refURL).Error())
+		fmt.Fprint(w, errors.Wrapf(err, "failed to parse url into a github repository: %s", refURL).Error())
 		return
 	}
 	doRedirect(w, repo, origQuery)

renovate.json

@@ -20,6 +20,6 @@
     }
   ],
   "constraints": {
-    "go": "1.23"
+    "go": "1.26"
   }
 }