cmd/gitmirror: bump resources

Change-Id: I634ffe2a7844a27e88bb958fa20836eaf500e915
Reviewed-on: https://go-review.googlesource.com/127316
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Author: bradfitz

cmd/gitmirror/rc-prod.yaml

@@ -34,8 +34,8 @@ spec:
         - containerPort: 8585
         resources:
           requests:
-            cpu: "1"
-            memory: "2Gi"
-          limits:
             cpu: "2"
-            memory: "4Gi"
+            memory: "5Gi"
+          limits:
+            cpu: "3"
+            memory: "6Gi"