Add new member to the SIG (#2095)

* add new member to the working group

* added new member to the group

* update spellchecker

.cspell.yaml

@@ -10,6 +10,7 @@ ignoreRegExpList:
     - Slack Channel ID
     - Google Docs ID
 words:
+    - Collibra
     - DASD
     - datadog
     - dynatrace
@@ -35,6 +36,7 @@ words:
     - afrittoli
     - alanwest
     - alevenberg
+    - alexvanboxel
     - alolita
     - amye
     - aniszczyk

projects/security-semconv.md

@@ -46,13 +46,13 @@ There is an open [PR](https://github.com/open-telemetry/semantic-conventions/iss
 * domain expert: @lambdanis (Isovalent)
 * domain expert: @mdelfabro (Dynatrace)
 * domain expert: @kelnage (Grafana Labs)
+* domain expert: @alexvanboxel (Collibra)
 
 * TC sponsor: @reyang
 * TC sponsor: @jsuereth
 
 Need more 
 - [ ] domain experts
-- [ ] TC 
 - [ ] potentially, maintainers of language-specific instrumentation may be needed if the need arises.