Telegraf 1.21.2 release notes (influxdata#3636)

* Telegraf 1.21.2 release notes

* Fix minor version

* fix typo

content/telegraf/v1.21/about_the_project/release-notes-changelog.md

@@ -10,6 +10,34 @@ menu:
     weight: 10
     parent: About the project
 ---
+## v1.21.2 [2022-1-5]
+
+- Add arm64 MacOS builds for M1 devices.
+- Add RISC-V64 Linux builds.
+- Complete numerous changes to CircleCI config to ensure more timely completion and more clear execution flow.
+- Update `github.com/djherbis/times` module from v1.2.0 to v1.5.0.
+- Update `github.com/go-ldap/ldap/v3` module from v3.1.0 to v3.4.1.
+- Update `github.com/gwos/tcg/sdk` module to v0.0.0-20211223101342-35fbd1ae683c.
+
+
+### Input plugin updates
+- Disk (`disk`): Fix issue of missing disks when running Telegraf in a container.
+- DPDK (`dpdk`): Add a note to documentation about socket availability.
+- Logparser (`logparser`): Resolve  panic in the logparser plugins due to a missing `Log`.
+- SNMP (`snmp`):
+  - Resolve panic due to a missing `gosmi` module.
+  - Resolve panic to check the index before assignment where a floating `::` exists.
+  - Resolve a panic when no MIBs folder was found.
+  - Ensure the module load order to avoid an SNMP marshal error.
+  - Now more accurately grabs MIB table columns.
+  - Networking no longer required during tests.
+- SNMP Trap (`snmp_trap`): Documented deprecation of the `timeout` setting.
+
+
+### Parser plugin updates
+- CSV (`csv`): Use an empty import of `tzdata` to correctly set the time zone.
+
+
 ## v1.21.1 [2021-12-16]
 
 ## Bug fixes

data/products.yml

@@ -35,7 +35,7 @@ telegraf:
   versions: [v1.9, v1.10, v1.11, v1.12, v1.13, v1.14, v1.15, v1.16, v1.17, v1.18, v1.19, v1.20, v1.21]
   latest: v1.21
   latest_patches:
-    "1.21": 1
+    "1.21": 2
     "1.20": 4
     "1.19": 3
     "1.18": 3