Update version number to 6.4.1

[TiejunMS]

No description provided.

[github-actions]

Test Results Web

159 tests  ±0   159 ✔️ ±0   20s ⏱️ -1s
    3 suites ±0       0 💤 ±0 
    3 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	79%	60%	✔
Summary	79% (2643 / 3359)	60% (1804 / 3014)	✔

[github-actions]

Test Results NetXDuo64

614 tests  ±0   614 ✔️ ±0   59s ⏱️ -1s
    1 suites ±0       0 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	97%	97%	✔
Summary	97% (11099 / 11441)	97% (6799 / 7037)	✔

[github-actions]

Test Results PTP

21 tests  ±0   21 ✔️ ±0   1s ⏱️ ±0s
  3 suites ±0     0 💤 ±0 
  3 files   ±0     0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	86%	59%	✔
Summary	86% (595 / 694)	59% (257 / 435)	✔

[github-actions]

Test Results MQTT

306 tests  ±0   306 ✔️ ±0   14s ⏱️ ±0s
    9 suites ±0       0 💤 ±0 
    9 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Test Results Crypto

132 tests  ±0   132 ✔️ ±0   10m 44s ⏱️ ±0s
    4 suites ±0       0 💤 ±0 
    4 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Test Results Azure_IoT

  3 files  ±0    3 suites  ±0   1m 45s ⏱️ -14s
21 tests ±0  21 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
63 runs  ±0  63 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	79%	68%	✔
Summary	79% (781 / 990)	68% (394 / 580)	✔

[github-actions]

Package	Line Rate	Branch Rate	Health
src	74%	67%	➖
Summary	74% (3972 / 5384)	67% (1533 / 2276)	➖

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	81%	67%	✔
azure-sdk-for-c.sdk.inc.azure.core	100%	67%	✔
Summary	81% (3405 / 4186)	67% (1750 / 2594)	✔

[github-actions]

Test Results NetXDuo_Fast

952 tests  ±0   952 ✔️ ±0   10m 7s ⏱️ +19s
    1 suites ±0       0 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Test Results MQTT_Interoperability

29 tests  ±0   29 ✔️ ±0   3m 2s ⏱️ ±0s
  9 suites ±0     0 💤 ±0 
  9 files   ±0     0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	48%	33%	❌
Summary	48% (476 / 990)	33% (192 / 580)	❌

[github-actions]

Test Results Secure

2 854 tests  ±0   2 854 ✔️ ±0   12m 48s ⏱️ +3s
     19 suites ±0          0 💤 ±0 
     19 files   ±0          0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
src	99%	99%	✔
Summary	99% (5568 / 5596)	99% (3265 / 3305)	✔

[github-actions]

Test Results Secure_Interoperability

562 tests  ±0   562 ✔️ ±0   30m 5s ⏱️ -1s
  18 suites ±0       0 💤 ±0 
  18 files   ±0       0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
src	59%	40%	➖
Summary	59% (3314 / 5596)	40% (1329 / 3305)	➖

[github-actions]

Test Results NetXDuo

37 265 tests  ±0   37 265 ✔️ ±0   59m 11s ⏱️ -31s
       43 suites ±0            0 💤 ±0 
       43 files   ±0            0 ❌ ±0 

Results for commit caf37d3. ± Comparison against base commit 02ee482.

[github-actions]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	100%	100%	✔
Summary	100% (11231 / 11257)	100% (6912 / 6925)	✔