revert pride logo (open-telemetry#1522)

* remove pride logo treatment

* update navbar logo

Author: austinlparker

assets/icons/logo-plain.svg

@@ -115,7 +115,7 @@ params:
           contributions or participation in the OpenTelemetry project.
 
   logos:
-    hero: opentelemetry-horizontal-pride.png
+    hero: opentelemetry-horizontal-color.png
     cncf: cncf.png
 
   social:

assets/icons/logo-pride.svg

@@ -4,7 +4,7 @@ show_banner: true
 ---
 
 {{< blocks/cover image_anchor="top" height="max" color="primary" >}}
-<img src="/img/logos/opentelemetry-horizontal-pride.svg" class="otel-logo" alt="OpenTelemetry"/>
+<img src="/img/logos/opentelemetry-horizontal-color.svg" class="otel-logo" alt="OpenTelemetry"/>
 
 ## High-quality, ubiquitous, and portable telemetry to enable effective observability