Fix regex for GITHUB_ENV parsing (#893)

* fix: correct env pattern regex

GitHub Actions allows for envvars to contain

Signed-off-by: hackercat <me@hackerc.at>

* format: format and typo fix

Signed-off-by: hackercat <me@hackerc.at>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/container/docker_run.go

@@ -369,7 +369,10 @@ var singleLineEnvPattern, mulitiLineEnvPattern *regexp.Regexp
 
 func (cr *containerReference) extractEnv(srcPath string, env *map[string]string) common.Executor {
 	if singleLineEnvPattern == nil {
-		singleLineEnvPattern = regexp.MustCompile("^([^=]+)=([^=]+)$")
+		// Single line pattern matches:
+		// SOME_VAR=data=moredata
+		// SOME_VAR=datamoredata
+		singleLineEnvPattern = regexp.MustCompile(`^([^=]*)\=(.*)$`)
 		mulitiLineEnvPattern = regexp.MustCompile(`^([^<]+)<<(\w+)$`)
 	}