CI: Upload the image for all platforms

For some reason the other platforms started failing, too. This
fixes it. Why? Don't know.

.gitlab-ci.yml

@@ -243,7 +243,7 @@ stop_review_app:
 
 amd64:
   stage: release
-  image: elixir:1.10.3
+  image: elixir:1.10.4
   only: &release-only
   - stable@pleroma/pleroma
   - develop@pleroma/pleroma
@@ -281,7 +281,7 @@ amd64-musl:
   stage: release
   artifacts: *release-artifacts
   only: *release-only
-  image: elixir:1.10.3-alpine
+  image: elixir:1.10.4-alpine
   cache: *release-cache
   variables: *release-variables
   before_script: &before-release-musl
@@ -309,7 +309,7 @@ arm-musl:
   only: *release-only
   tags:
     - arm32-specified
-  image: arm32v7/elixir:1.10.3-alpine
+  image: arm32v7/elixir:1.10.4-alpine
   cache: *release-cache
   variables: *release-variables
   before_script: *before-release-musl
@@ -333,7 +333,7 @@ arm64-musl:
   only: *release-only
   tags:
     - arm
-  image: arm64v8/elixir:1.10.3-alpine
+  image: arm64v8/elixir:1.10.4-alpine
   cache: *release-cache
   variables: *release-variables
   before_script: *before-release-musl