adds dotnet-autoinstrumentation image version env var to the operator…

… image publish workflow (open-telemetry#1060)

.github/workflows/publish-images.yaml

@@ -27,6 +27,7 @@ jobs:
           grep -v '\#' versions.txt | grep autoinstrumentation-java | awk -F= '{print "AUTO_INSTRUMENTATION_JAVA_VERSION="$2}' >> $GITHUB_ENV
           grep -v '\#' versions.txt | grep autoinstrumentation-nodejs | awk -F= '{print "AUTO_INSTRUMENTATION_NODEJS_VERSION="$2}' >> $GITHUB_ENV
           grep -v '\#' versions.txt | grep autoinstrumentation-python | awk -F= '{print "AUTO_INSTRUMENTATION_PYTHON_VERSION="$2}' >> $GITHUB_ENV
+          grep -v '\#' versions.txt | grep autoinstrumentation-dotnet | awk -F= '{print "AUTO_INSTRUMENTATION_DOTNET_VERSION="$2}' >> $GITHUB_ENV
           echo "VERSION_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_ENV
           echo "VERSION=$(git describe --tags | sed 's/^v//')" >> $GITHUB_ENV
 
@@ -79,6 +80,7 @@ jobs:
             TARGETALLOCATOR_VERSION=${{ env.TARGETALLOCATOR_VERSION }}
             AUTO_INSTRUMENTATION_JAVA_VERSION=${{ env.AUTO_INSTRUMENTATION_JAVA_VERSION }}
             AUTO_INSTRUMENTATION_NODEJS_VERSION=${{ env.AUTO_INSTRUMENTATION_NODEJS_VERSION }}
-            AUTO_INSTRUMENTATION_PYTHON_VERSION=${{ env. AUTO_INSTRUMENTATION_PYTHON_VERSION }}
+            AUTO_INSTRUMENTATION_PYTHON_VERSION=${{ env.AUTO_INSTRUMENTATION_PYTHON_VERSION }}
+            AUTO_INSTRUMENTATION_DOTNET_VERSION=${{ env.AUTO_INSTRUMENTATION_DOTNET_VERSION }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache