Update Discord logo (#29285)

Fixes #27057 by changing the discord .svg file and running `make svg`.

Before:

<img width="637"
src="https://private-user-images.githubusercontent.com/85847352/267667100-1eaf5d20-b4e9-4736-bb55-7f1da04bbde7.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.C6jVQLFPfq4fhGV8wiY9D-P21PUNTDMkX2d2-kU17Ug">

After:

<img width="637"
src="45b197ae-e422-42f4-999e-25dc8f6b7a92">

(cherry picked from commit 3d3c3d9ee5e934c515370d98f1c552ca8ef10f8a)

public/assets/img/svg/gitea-discord.svg

@@ -1 +1 @@
-<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" class="gitea-discord__svg gitea-discord__gitea-discord svg gitea-discord" preserveAspectRatio="xMidYMid" viewBox="0 0 256 293" width="16" height="16"><path fill="#7289DA" d="M226.011 0H29.99C13.459 0 0 13.458 0 30.135v197.778c0 16.677 13.458 30.135 29.989 30.135h165.888l-7.754-27.063 18.725 17.408 17.7 16.384L256 292.571V30.135C256 13.458 242.542 0 226.011 0m-56.466 191.05s-5.266-6.291-9.655-11.85c19.164-5.413 26.478-17.408 26.478-17.408-5.998 3.95-11.703 6.73-16.823 8.63-7.314 3.073-14.336 5.12-21.211 6.291-14.044 2.633-26.917 1.902-37.888-.146-8.339-1.61-15.507-3.95-21.504-6.29-3.365-1.317-7.022-2.926-10.68-4.974-.438-.293-.877-.439-1.316-.732a2 2 0 0 1-.585-.438c-2.633-1.463-4.096-2.487-4.096-2.487s7.022 11.703 25.6 17.261c-4.388 5.56-9.801 12.142-9.801 12.142-32.33-1.024-44.617-22.235-44.617-22.235 0-47.104 21.065-85.285 21.065-85.285 21.065-15.799 41.106-15.36 41.106-15.36l1.463 1.756C80.75 77.53 68.608 89.088 68.608 89.088s3.218-1.755 8.63-4.242c15.653-6.876 28.088-8.777 33.208-9.216.877-.147 1.609-.293 2.487-.293a123.8 123.8 0 0 1 29.55-.292c13.896 1.609 28.818 5.705 44.031 14.043 0 0-11.556-10.971-36.425-18.578l2.048-2.34s20.041-.44 41.106 15.36c0 0 21.066 38.18 21.066 85.284 0 0-12.435 21.211-44.764 22.235zm-68.023-68.316c-8.338 0-14.92 7.314-14.92 16.237 0 8.924 6.728 16.238 14.92 16.238 8.339 0 14.921-7.314 14.921-16.238.147-8.923-6.582-16.237-14.92-16.237m53.394 0c-8.339 0-14.922 7.314-14.922 16.237 0 8.924 6.73 16.238 14.922 16.238 8.338 0 14.92-7.314 14.92-16.238s-6.582-16.237-14.92-16.237"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 127.14 96.36" class="svg gitea-discord" width="16" height="16" aria-hidden="true"><path fill="#5865f2" d="M107.7 8.07A105.2 105.2 0 0 0 81.47 0a72 72 0 0 0-3.36 6.83 97.7 97.7 0 0 0-29.11 0A72 72 0 0 0 45.64 0a106 106 0 0 0-26.25 8.09C2.79 32.65-1.71 56.6.54 80.21a105.7 105.7 0 0 0 32.17 16.15 77.7 77.7 0 0 0 6.89-11.11 68.4 68.4 0 0 1-10.85-5.18c.91-.66 1.8-1.34 2.66-2a75.57 75.57 0 0 0 64.32 0c.87.71 1.76 1.39 2.66 2a68.7 68.7 0 0 1-10.87 5.19 77 77 0 0 0 6.89 11.1 105.3 105.3 0 0 0 32.19-16.14c2.64-27.38-4.51-51.11-18.9-72.15M42.45 65.69C36.18 65.69 31 60 31 53s5-12.74 11.43-12.74S54 46 53.89 53s-5.05 12.69-11.44 12.69m42.24 0C78.41 65.69 73.25 60 73.25 53s5-12.74 11.44-12.74S96.23 46 96.12 53s-5.04 12.69-11.43 12.69"/></svg>