Update dependency com.github.sbt:sbt-github-actions to v0.26.0

Author: renovate[bot]

project/plugins.sbt

@@ -1,5 +1,5 @@
 addSbtPlugin("com.eed3si9n"     % "sbt-buildinfo"             % "0.11.0")
 addSbtPlugin("com.github.cb372" % "sbt-explicit-dependencies" % "0.3.1")
-addSbtPlugin("com.github.sbt"   % "sbt-github-actions"        % "0.23.0")
+addSbtPlugin("com.github.sbt"   % "sbt-github-actions"        % "0.26.0")
 addSbtPlugin("org.scalameta"    % "sbt-scalafmt"              % "2.5.2")
 addSbtPlugin("org.typelevel"    % "sbt-tpolecat"              % "0.5.1")