docs: update spock (fadeout) and svelte (trial)

radar/2023-09-01/spock_geb.md

@@ -0,0 +1,10 @@
+---
+title:      "Spock + Geb"
+ring:       hold
+quadrant:   languages-and-frameworks
+tags:       [coding, quality assurance]
+featured:   false
+---
+
+Most projects at AOE moved away from Groovy and other testing frameworks for JVM languages are way more advanced 
+or comfortable in their usage. Because of that, mentioning Spock seems no longer relevant.

radar/2023-09-01/svelte.md

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+---
+title:      "Svelte"
+ring:       trial
+quadrant:   "languages-and-frameworks"
+tags:       [coding, frontend]
+---
+
+We have some smaller Svelte projects at AOE. There are some features we would like to use and explore further, like
+
+- can be used together with other libraries or frameworks
+- server-side rendering by default
+- super fast