content(src/content/talks): add more slides and videos

Author: ythecombinator

src/content/talks/consistent-ux-at-scale-lessons-learned-when-i-wore-the-design-ops-hat/index.mdx

@@ -23,6 +23,7 @@ In this session, I'm gathering the common denominators I've noticed while workin
       city: "Berlin, Germany",
       thumbnail: berlin,
       date: "December 2, 2022",
+      slides: "https://speakerdeck.com/ythecombinator/react-day-berlin-2022"
     },
     {
       name: "Dev Conf 2022",

src/content/talks/deep-diving-on-concurrent-react/index.mdx

@@ -33,6 +33,7 @@ Writing fluid user interfaces becomes more and more challenging as the applicati
       thumbnail: london,
       date: "October 21, 2022",
       slides: "https://speakerdeck.com/ythecombinator/react-advanced-2022",
+      video: "https://youtu.be/N74nnvy3x38",
     },
     {
       name: "React Brussels 2022",

src/content/talks/web-performance-apis-you-probably-didnt-know-existed/index.mdx

@@ -43,6 +43,7 @@ In this talk, we’ll see how to leverage the power of some of them to reliably
       thumbnail: oslo,
       date: "September 28, 2022",
       slides: "https://speakerdeck.com/ythecombinator/ndc-oslo-2022",
+      video: "https://youtu.be/bC4ZNsc97Xk",
     },
   ]}
 />