Bump Fabric example to 0.77.0 (#3351)

## Description

This PR bumps FabricExample app to stable 0.77.0

## Test plan

Run example app on iOS and Android

Author: m-bert

FabricExample/Gemfile

@@ -6,4 +6,5 @@ ruby ">= 2.6.10"
 # Exclude problematic versions of cocoapods and activesupport that causes build failures.
 gem 'cocoapods', '>= 1.13', '!= 1.15.0', '!= 1.15.1'
 gem 'activesupport', '>= 6.1.7.5', '< 7.1.0'
-gem 'xcodeproj', '< 1.26.0'
+gem 'xcodeproj', '< 1.26.0'
+gem 'concurrent-ruby', '< 1.3.4'

FabricExample/Gemfile.lock

@@ -56,7 +56,7 @@ GEM
       netrc (~> 0.11)
     cocoapods-try (1.2.0)
     colored2 (3.1.2)
-    concurrent-ruby (1.3.4)
+    concurrent-ruby (1.3.3)
     escape (0.0.4)
     ethon (0.16.0)
       ffi (>= 1.15.0)
@@ -96,6 +96,7 @@ PLATFORMS
 DEPENDENCIES
   activesupport (>= 6.1.7.5, < 7.1.0)
   cocoapods (>= 1.13, != 1.15.1, != 1.15.0)
+  concurrent-ruby (< 1.3.4)
   xcodeproj (< 1.26.0)
 
 RUBY VERSION