chore(.github/maintainers.yaml): add maxgio92 as new maintainer

Signed-off-by: Massimiliano Giovagnoli <me@maxgio.it>

Author: maxgio92

.github/maintainers.yaml

@@ -21,3 +21,9 @@
   company: Peak Scale
   projects:
     - https://github.com/projectcapsule/capsule
+- name: Massimiliano Giovagnoli
+  github: https://github.com/maxgio92
+  company: Proximus
+  projects:
+    - https://github.com/projectcapsule/capsule
+    - https://github.com/projectcapsule/capsule-proxy