ci: switch CONTRIB_REPO_SHA back to main (open-telemetry#4540)

Author: xrmx

.github/workflows/contrib.yml

@@ -15,4 +15,4 @@ jobs:
     uses: open-telemetry/opentelemetry-python-contrib/.github/workflows/core_contrib_test_0.yml@main
     with:
       CORE_REPO_SHA: ${{ github.sha }}
-      CONTRIB_REPO_SHA: opentelemetrybot/update-version-to-1.33.0.dev-0.54b0.dev
+      CONTRIB_REPO_SHA: main

.github/workflows/lint_0.yml

@@ -15,7 +15,7 @@ concurrency:
 
 env:
   CORE_REPO_SHA: main
-  CONTRIB_REPO_SHA: opentelemetrybot/update-version-to-1.33.0.dev-0.54b0.dev
+  CONTRIB_REPO_SHA: main
   PIP_EXISTS_ACTION: w
 
 jobs:

.github/workflows/misc_0.yml

@@ -15,7 +15,7 @@ concurrency:
 
 env:
   CORE_REPO_SHA: main
-  CONTRIB_REPO_SHA: opentelemetrybot/update-version-to-1.33.0.dev-0.54b0.dev
+  CONTRIB_REPO_SHA: main
   PIP_EXISTS_ACTION: w
 
 jobs:

.github/workflows/test_0.yml

@@ -15,7 +15,7 @@ concurrency:
 
 env:
   CORE_REPO_SHA: main
-  CONTRIB_REPO_SHA: opentelemetrybot/update-version-to-1.33.0.dev-0.54b0.dev
+  CONTRIB_REPO_SHA: main
   PIP_EXISTS_ACTION: w
 
 jobs:

.github/workflows/test_1.yml

@@ -15,7 +15,7 @@ concurrency:
 
 env:
   CORE_REPO_SHA: main
-  CONTRIB_REPO_SHA: opentelemetrybot/update-version-to-1.33.0.dev-0.54b0.dev
+  CONTRIB_REPO_SHA: main
   PIP_EXISTS_ACTION: w
 
 jobs: