rc docs: fix code section not rendering properly due to missing quotes

docs/content/rc.md

@@ -440,6 +440,7 @@ Returns the following values:
 			...
 		]
 }
+```
 
 ### core/memstats: Returns the memory statistics {#core/memstats}
 
@@ -547,6 +548,7 @@ Returns the following values:
 			}
 		]
 }
+```
 
 ### core/version: Shows the current version of rclone and the go runtime. {#core/version}
 

fs/accounting/stats_groups.go

@@ -156,6 +156,7 @@ Returns the following values:
 			}
 		]
 }
+` + "```" + `
 `,
 	})
 
@@ -176,6 +177,7 @@ Returns the following values:
 			...
 		]
 }
+` + "```" + `
 `,
 	})
 
@@ -189,6 +191,7 @@ is provided.
 
 Parameters
 - group - name of the stats group (string)
+` + "```" + `
 `,
 	})
 }