Fix some link bugs (#263)

Closes #251. Closes #258.

Co-authored-by: Jared He <66887902+jaredjhe@users.noreply.github.com>
Reviewed-on: #263
Reviewed-by: Amy <a258wang@csclub.uwaterloo.ca>
Reviewed-by: Aditya Thakral <a3thakra@csclub.uwaterloo.ca>
Co-authored-by: j285he <j285he@localhost>
Co-committed-by: j285he <j285he@localhost>

components/Button.tsx

@@ -21,6 +21,7 @@ export function Button(props: Props) {
       <a
         {...otherProps}
         target="_blank"
+        rel="noreferrer"
         className={`${styles.link} ${styles[btnSize]} ${
           otherProps.className ?? ""
         }`}

content/about/index.mdx

@@ -51,7 +51,7 @@ The CS Club team is devoted to providing you with all the resources you could
 need as a student. We want to create a community that members can call home, to
 make it a place where you can reach out for career advice, for academic help, or
 even just to socialize. To fulfil this mission, we'll be running events and
-initiatives throughout the term, so please check out our [Events](/events/current)
+initiatives throughout the term, so please check out our [Events](/events)
 page to stay updated!
 
 </Bubble>