Fixup documentation

- better gomarkdown generation that now fixed the escaped strings, no
  need to use pandoc anymore
- added workflow image
- upgraded versions of mkdocs requirements

doc/docs/packages/update.md

@@ -2,54 +2,59 @@
 
 # update
 
-``` go
+```go
 import "katenary/update"
 ```
 
-Update package is used to check if a new version of katenary is
-available.
+Update package is used to check if a new version of katenary is available.
 
 ## Variables
 
-``` go
-var Version = "master" // reset by cmd/main.go
+<a name="Version"></a>
+
+```go
+var (
+    Version = "master" // reset by cmd/main.go
+)
 ```
 
-## func DownloadFile
+<a name="DownloadFile"></a>
+## func [DownloadFile](<https://github.com/metal3d/katenary/blob/develop/update/main.go#L134>)
 
-``` go
+```go
 func DownloadFile(url, exe string) error
 ```
 
-DownloadFile will download a url to a local file. It also ensure that
-the file is executable.
+DownloadFile will download a url to a local file. It also ensure that the file is executable.
 
-## func DownloadLatestVersion
+<a name="DownloadLatestVersion"></a>
+## func [DownloadLatestVersion](<https://github.com/metal3d/katenary/blob/develop/update/main.go#L80>)
 
-``` go
+```go
 func DownloadLatestVersion(assets []Asset) error
 ```
 
 DownloadLatestVersion will download the latest version of katenary.
 
-## type Asset
+<a name="Asset"></a>
+## type [Asset](<https://github.com/metal3d/katenary/blob/develop/update/main.go#L23-L26>)
 
 Asset is a github asset from release url.
 
-``` go
+```go
 type Asset struct {
     Name string `json:"name"`
     URL  string `json:"browser_download_url"`
 }
 ```
 
-### func CheckLatestVersion
+<a name="CheckLatestVersion"></a>
+### func [CheckLatestVersion](<https://github.com/metal3d/katenary/blob/develop/update/main.go#L29>)
 
-``` go
+```go
 func CheckLatestVersion() (string, []Asset, error)
 ```
 
-CheckLatestVersion check katenary latest version from release and
-propose to download it
+CheckLatestVersion check katenary latest version from release and propose to download it
 
-Generated by [gomarkdoc](https://github.com/princjef/gomarkdoc)
+Generated by [gomarkdoc](<https://github.com/princjef/gomarkdoc>)