Add --retry-times to markdown docs

Fixes #1322.

Signed-off-by: Jesse Rittner <rittneje@gmail.com>

docs/skopeo-copy.1.md

@@ -92,6 +92,8 @@ Existing signatures, if any, are preserved as well.
 
 **--dest-registry-token** _Bearer token_ for accessing the destination registry.
 
+**--retry-times**  the number of times to retry, retry wait time will be exponentially increased based on the number of failed attempts.
+
 ## EXAMPLES
 
 To just copy an image from one registry to another:

docs/skopeo-delete.1.md

@@ -36,6 +36,8 @@ Additionally, the registry must allow deletions by setting `REGISTRY_STORAGE_DEL
 
 **--registry-token** _Bearer token_ for accessing the registry.
 
+**--retry-times**  the number of times to retry, retry wait time will be exponentially increased based on the number of failed attempts.
+
 ## EXAMPLES
 
 Mark image example/pause for deletion from the registry.example.com registry:

docs/skopeo-list-tags.1.md

@@ -25,6 +25,8 @@ Return a list of tags from _repository-name_ in a registry.
 
   **--registry-token** _Bearer token_ for accessing the registry.
 
+  **--retry-times**  the number of times to retry, retry wait time will be exponentially increased based on the number of failed attempts.
+
 ## REPOSITORY NAMES
 
 Repository names are transport-specific references as each transport may have its own concept of a "repository" and "tags". Currently, only the Docker transport is supported.

docs/skopeo-sync.1.md

@@ -82,6 +82,8 @@ Path of the authentication file for the destination registry. Uses path given by
 
 **--dest-registry-token** _Bearer token_ for accessing the destination registry.
 
+**--retry-times**  the number of times to retry, retry wait time will be exponentially increased based on the number of failed attempts.
+
 ## EXAMPLES
 
 ### Synchronizing to a local directory