Update workflows to print diff

Author: Mr3zee

.github/workflows/protobuf-conformance.yml

@@ -23,5 +23,7 @@ jobs:
         run: |
           if [[ -n "$(git status --porcelain | grep tests/protobuf-conformance/)" ]]; then
             echo "Protobuf conformance test is not up to date. Please run './gradlew tests:protobuf-conformance:bufGenerateMain' and commit changes"
+            git status --porcelain
+            git diff --minimal | cat
             exit 1
           fi

.github/workflows/protobuf-well-known-types.yml

@@ -23,5 +23,7 @@ jobs:
         run: |
           if [[ -n "$(git status --porcelain | grep protobuf/protobuf-core/)" ]]; then
             echo "Well-Known Types are not up-to-date. Please run './gradlew :protobuf:protobuf-core:bufGenerateCommonMain' and commit changes"
+            git status --porcelain
+            git diff --minimal | cat
             exit 1
           fi