Update agent version

Author: brancz

action.yml

@@ -11,7 +11,7 @@ inputs:
   parca_agent_version:
     description: 'Parca agent version.'
     required: false
-    default: '0.35.3'
+    default: '0.38.1'
   profiling_frequency:
     description: 'The frequency at which profiling data is collected. Parca Agent defaults to 19, but to gather more data in CI we recommend a higher frequency.'
     required: false
@@ -43,4 +43,4 @@ outputs:
 runs:
   using: 'node16'
   main: 'index.js'
-  post: 'index.js'
+  post: 'index.js'